Question

Solve y =4X+8X for x.

Answer 1

$\textcolor{#FF7968}{x=\frac{y}{12}}$

We first combine like terms on the right-hand side to get

$y=12x$

and then divide both sides by 12 to get

$\frac{y}{12}=\frac{12x}{12}$$\textcolor{#FF7968}{\therefore x=\frac{y}{12}.}$

which is our answer!