Question

Solve:
$\frac{7y}{5}=y-4$

Answer 1

$$\begin{gathered} \frac{7y}{5}=y-4 \\ \mathrm{By}\mathrm{cross}\mathrm{multiplication}: \\ \Rightarrow 7y=5(y-4) \\ \Rightarrow 7y=5y-20 \\ \Rightarrow 7y-5y=-20 \\ \Rightarrow 2y=-20 \\ \Rightarrow y=\frac{-20}{2}=-10 \\ \therefore y=-10 \end{gathered}$$