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