`5. (x - $4^2$) - 7 = 13`

 `5. (x - $4^2$)     = 13 + 7`

`3/2` - `|x + 2|` `=` `1/2`

           `|x + 2|` `=` `3/2 - 1/2`

           `|x + 2|` `=` `1`

$$\begin{gathered} (x + 3) + 352 = 465 \\ (x + 3) = 465 - 352 \\ (x + 3) =113 \\ x = 113 - 3 \\ x =110 \end{gathered}$$

Vậy x = 110

(x + 12)3 = -8 (x+12)3 = (-2)3 ⇒x + 12 = -2    x            = (-2) - 12    x            = -52

Vậy x = -5/2

$$\begin{gathered} 44 + 7 . x = 100 \\ 7 . x = 100 - 44 \\ 7 . x = 56 \\ x = 56 : 7 \\ x = 8 \end{gathered}$$

Vậy x = 8 

$$\begin{gathered} x + \frac{30}{100}= \frac{-1}{3} \\ x = \left(\begin{array}{c}-1\\ 3\end{array}\right) - \frac{30}{100} \\ x = \frac{-19}{30} \end{gathered}$$

Vậy x = $\frac{-19}{30}$

$$\begin{gathered} = \frac{11}{4}-\frac{5}{9}\times \frac{8}{33} \\ = \frac{11}{4}-\frac{40}{297} \\ = \frac{3107}{1188} \end{gathered}$$

Áp dụng CT : nhân chia trc, cộng từ sau

3 - y : $\frac{1}{5}$ = $1\frac{1}{3}$

3 - y : $\frac{1}{5}$ = $\frac{4}{3}$

     y : $\frac{1}{5}$ = 3 - $\frac{4}{3}$

     y : $\frac{1}{5}$ = $\frac{5}{3}$

     y        =  $\frac{5}{3}$ $\times$ $\frac{1}{5}$

     y        = 1/3

Vậy y = 1/3

3 - y : $\frac{1}{5}$ = $1\frac{1}{3}$

3 - y : $\frac{1}{5}$ = $\frac{4}{3}$

     y : $\frac{1}{5}$ = 3 - $\frac{4}{3}$

     y : $\frac{1}{5}$ = $\frac{5}{3}$

     y        =  $\frac{5}{3}$ $\times$ $\frac{1}{5}$

     y        = 1/3

Vậy y = 1/3

1. 2/5 : x = 1/5

            x = 2/5 : 1/5

            x = 2

Vậy x = 2

2. x : 8/11 = 11/13

    x           = 11/13$\times$8/11

    x           = 8/13

Vậy x = 8/13

3. 4/7 : x = 1/5

            x = 4/7 : 1/5

            x = 20/7

Vậy x = 20/7

4. 7/8$\times$x = 1/3

             x = 1/3 : 7/8

             x = 8/21

Vậy x = 8/21

12 + x = 1

        x = 1 - 12

        x = -11

Vậy x = -11

351 - x = -(-406)

351 - x = 406

         x = 351 - 406

         x = -55

Vậy x = -55

1. What activity do you often take part in to help you community?

- I participate in volunteer work, help homeless children and lonely elderly people, I cook and donate clothes for them.

Em tham khảo :

27. You must make an appointment in advance .

$\Rightarrow$ An appointment must be made in advance.

28. Someone might steal the car .

Em có thể tham khảo của chị nhé :

9:30 = Nine hours and thirty minutes

10:20 = Ten hours and twenty minutes

4:30 = Four hours and thirty minutes
7:45 = Seven hours and forty-five minutes

8:15 = Eight hours and five minutes

12:40 = Twelve hours and forty minutes

5:55 = Five hours and fifty-five minutes

8:50 = Eight hours and fifty minutes

Em có thể tham khảo cách chị nhé