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2 câu trả lời 194
To solve the equation
\[
\frac{4}{5} = -\frac{12}{9} - x,
\]
we can start by isolating \(x\). First, let's simplify \(-\frac{12}{9}\):
\[
-\frac{12}{9} = -\frac{4}{3}.
\]
Now we can rewrite the equation:
\[
\frac{4}{5} = -\frac{4}{3} - x.
\]
To isolate \(x\), we can rearrange the equation:
\[
x = -\frac{4}{3} - \frac{4}{5}.
\]
Now we need a common denominator to combine the fractions. The least common multiple of 3 and 5 is 15. Now, let's rewrite each fraction with the common denominator:
\[
-\frac{4}{3} = -\frac{4 \times 5}{3 \times 5} = -\frac{20}{15},
\]
\[
-\frac{4}{5} = -\frac{4 \times 3}{5 \times 3} = -\frac{12}{15}.
\]
Now we can combine the two fractions:
\[
x = -\frac{20}{15} - \frac{12}{15} = -\frac{20 + 12}{15} = -\frac{32}{15}.
\]
Thus, the solution for \(x\) is
\[
\boxed{-\frac{32}{15}}.
\]
4×(9-x)=-60
9-x=-60:4
9-x=15
x=15-9
x=6
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