Solve for x
x=-\frac{y}{3}+60
Solve for y
y=180-3x
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3x=180-y
Subtract y from both sides.
\frac{3x}{3}=\frac{180-y}{3}
Divide both sides by 3.
x=\frac{180-y}{3}
Dividing by 3 undoes the multiplication by 3.
x=-\frac{y}{3}+60
Divide 180-y by 3.
y=180-3x
Subtract 3x from both sides.
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