Solve for x
x=90-2y
Solve for y
y=-\frac{x}{2}+45
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2x=180-4y
Subtract 4y from both sides.
\frac{2x}{2}=\frac{180-4y}{2}
Divide both sides by 2.
x=\frac{180-4y}{2}
Dividing by 2 undoes the multiplication by 2.
x=90-2y
Divide 180-4y by 2.
4y=180-2x
Subtract 2x from both sides.
\frac{4y}{4}=\frac{180-2x}{4}
Divide both sides by 4.
y=\frac{180-2x}{4}
Dividing by 4 undoes the multiplication by 4.
y=-\frac{x}{2}+45
Divide 180-2x by 4.
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