Question

Given: x + 2y = -6. Solve for y.

Answer 1

$x + 2y =-6$

Subtract x on both sides

$x + 2y-x =-6-x$

$2y =-6-x$

Divide by 2 on both sides

$\frac{2y}{2} =\frac{-x-6}{2}\\\\y =\frac{-x-6}{2}\\\\ \boxed{\bf{y=-\frac{1}{2}x -3}}$