Dũng Nguyễn Hỏi từ APP VIETJACK
đã hỏi trong Lớp 6 Toán học
· 21:17 27/11/2021
Theo dõi Báo cáo
Tìm x biết :
a) (x - 5) + 2x = 16
b) x – (4x + 13) = 2;
c) 12 – 4x + (x – 8) = – 14; d) –( 2x – 3) + (4 + x) = 0;
e) 3x + 27 – 2(x – 4) = –13. 195 + 13.95
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1 câu trả lời 2297

Hoàng Thị Hiên
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a) (x - 5) + 2x = 16 =>x-5+2x=16=>3x-5=16=>3x=16+5=>3x=21=>x=7Vậy x=7b) x – (4x + 13) = 2=>x-4x-13=2=>-3x-13=2=>-3x=2+13=>-3x=15=>x=-5vậy x=-5 c) 12 – 4x + (x – 8) = – 14=>12-4x+x-8=-14=>-3x+4=-14=>-3x=-14-4=>-3x=-18=>x=6vậy x=6d) –( 2x – 3) + (4 + x) = 0=>-2x+3+4+x=0=>-x+7=0=>x=7Vậy x=7 e) 3x + 27 – 2(x – 4) = –13. 195 + 13.95=>3x+27-2x+8=13.-195+95=>x+35=13.-100=>x+35=-1300=>x=-1300-35=>x=-1335Vậy x=-1335..

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liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335v
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
liên mai · 10 giờ trước
a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335a ) ( x − 5 ) + 2 x = 16 = > x − 5 + 2 x = 16 = > 3 x − 5 = 16 = > 3 x = 16 + 5 = > 3 x = 21 = > x = 7 V ậ y x = 7 b ) x – ( 4 x + 13 ) = 2 = > x − 4 x − 13 = 2 = > − 3 x − 13 = 2 = > − 3 x = 2 + 13 = > − 3 x = 15 = > x = − 5 v ậ y x = − 5 c ) 12 – 4 x + ( x – 8 ) = – 14 = > 12 − 4 x + x − 8 = − 14 = > − 3 x + 4 = − 14 = > − 3 x = − 14 − 4 = > − 3 x = − 18 = > x = 6 v ậ y x = 6 d ) – ( 2 x – 3 ) + ( 4 + x ) = 0 = > − 2 x + 3 + 4 + x = 0 = > − x + 7 = 0 = > x = 7 V ậ y x = 7 e ) 3 x + 27 – 2 ( x – 4 ) = – 13 . 195 + 13 . 95 = > 3 x + 27 − 2 x + 8 = 13 . ( − 195 + 95 ) = > x + 35 = 13 . ( − 100 ) = > x + 35 = − 1300 = > x = − 1300 − 35 = > x = − 1335 V ậ y x = − 1335
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