Solve for y
y=\frac{x+13}{4}
Solve for x
x=4y-13
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-4y=-13-x
Subtract x from both sides.
-4y=-x-13
The equation is in standard form.
\frac{-4y}{-4}=\frac{-x-13}{-4}
Divide both sides by -4.
y=\frac{-x-13}{-4}
Dividing by -4 undoes the multiplication by -4.
y=\frac{x+13}{4}
Divide -13-x by -4.
x=-13+4y
Add 4y to both sides.
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