Solve for x
x=-y-6
Solve for y
y=-\left(x+6\right)
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-18-3x=3y
Swap sides so that all variable terms are on the left hand side.
-3x=3y+18
Add 18 to both sides.
\frac{-3x}{-3}=\frac{3y+18}{-3}
Divide both sides by -3.
x=\frac{3y+18}{-3}
Dividing by -3 undoes the multiplication by -3.
x=-\left(y+6\right)
Divide 18+3y by -3.
3y=-3x-18
The equation is in standard form.
\frac{3y}{3}=\frac{-3x-18}{3}
Divide both sides by 3.
y=\frac{-3x-18}{3}
Dividing by 3 undoes the multiplication by 3.
y=-x-6
Divide -18-3x by 3.
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