Question:
Solve:
$\frac{7 y}{5}=y-4$
Solution:
$\frac{7 y}{5}=y-4$
By cross multiplication:
$\Rightarrow 7 y=5(y-4)$
$\Rightarrow 7 y=5 y-20$
$\Rightarrow 7 y-5 y=-20$
$\Rightarrow 2 y=-20$
$\Rightarrow y=\frac{-20}{2}=-10$
$\therefore y=-10$
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