Solve for y
y=\frac{x+36}{4}
Solve for x
x=4\left(y-9\right)
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-4y=-36-x
Subtract x from both sides.
-4y=-x-36
The equation is in standard form.
\frac{-4y}{-4}=\frac{-x-36}{-4}
Divide both sides by -4.
y=\frac{-x-36}{-4}
Dividing by -4 undoes the multiplication by -4.
y=\frac{x}{4}+9
Divide -36-x by -4.
x=-36+4y
Add 4y to both sides.
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