Solve for x
x=y+9
Solve for y
y=x-9
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-2x=-18-2y
Subtract 2y from both sides.
-2x=-2y-18
The equation is in standard form.
\frac{-2x}{-2}=\frac{-2y-18}{-2}
Divide both sides by -2.
x=\frac{-2y-18}{-2}
Dividing by -2 undoes the multiplication by -2.
x=y+9
Divide -18-2y by -2.
2y=-18+2x
Add 2x to both sides.
2y=2x-18
The equation is in standard form.
\frac{2y}{2}=\frac{2x-18}{2}
Divide both sides by 2.
y=\frac{2x-18}{2}
Dividing by 2 undoes the multiplication by 2.
y=x-9
Divide -18+2x by 2.
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