Question

\(\dfrac{5}{4}=\dfrac{9-2x}{-12}\)

Answer 1

\(\dfrac{5}{4}=\dfrac{9-2x}{-12}\)

\(\Rightarrow4\cdot\left(9-2x\right)=5\cdot\left(-12\right)\)

\(\Rightarrow36-8x=-60\)

\(\Rightarrow-8x=-60-36\)

\(\Rightarrow-8x=-96\)

\(\Rightarrow x=\dfrac{-96}{-8}\)

\(\Rightarrow x=12\)

Vậy $x=12$.