Solve for x
x=4-4y
Solve for y
y=-\frac{x}{4}+1
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5x=20-20y
Subtract 20y from both sides.
\frac{5x}{5}=\frac{20-20y}{5}
Divide both sides by 5.
x=\frac{20-20y}{5}
Dividing by 5 undoes the multiplication by 5.
x=4-4y
Divide 20-20y by 5.
20y=20-5x
Subtract 5x from both sides.
\frac{20y}{20}=\frac{20-5x}{20}
Divide both sides by 20.
y=\frac{20-5x}{20}
Dividing by 20 undoes the multiplication by 20.
y=-\frac{x}{4}+1
Divide 20-5x by 20.
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