Solve for x
x=20-2y
Solve for y
y=-\frac{x}{2}+10
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10x=200-20y
Subtract 20y from both sides.
\frac{10x}{10}=\frac{200-20y}{10}
Divide both sides by 10.
x=\frac{200-20y}{10}
Dividing by 10 undoes the multiplication by 10.
x=20-2y
Divide 200-20y by 10.
20y=200-10x
Subtract 10x from both sides.
\frac{20y}{20}=\frac{200-10x}{20}
Divide both sides by 20.
y=\frac{200-10x}{20}
Dividing by 20 undoes the multiplication by 20.
y=-\frac{x}{2}+10
Divide 200-10x by 20.
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