Solve for x
x=-\frac{y}{2}+90
Solve for y
y=180-2x
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4x=360-2y
Subtract 2y from both sides.
\frac{4x}{4}=\frac{360-2y}{4}
Divide both sides by 4.
x=\frac{360-2y}{4}
Dividing by 4 undoes the multiplication by 4.
x=-\frac{y}{2}+90
Divide 360-2y by 4.
2y=360-4x
Subtract 4x from both sides.
\frac{2y}{2}=\frac{360-4x}{2}
Divide both sides by 2.
y=\frac{360-4x}{2}
Dividing by 2 undoes the multiplication by 2.
y=180-2x
Divide 360-4x by 2.
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