Solve for x
x=-\frac{y}{3}-4
Solve for y
y=-3x-12
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-3x-12=y
Swap sides so that all variable terms are on the left hand side.
-3x=y+12
Add 12 to both sides.
\frac{-3x}{-3}=\frac{y+12}{-3}
Divide both sides by -3.
x=\frac{y+12}{-3}
Dividing by -3 undoes the multiplication by -3.
x=-\frac{y}{3}-4
Divide y+12 by -3.
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