Solve for x
x=20-4y
Solve for y
y=-\frac{x}{4}+5
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-x=-20+4y
Add 4y to both sides.
-x=4y-20
The equation is in standard form.
\frac{-x}{-1}=\frac{4y-20}{-1}
Divide both sides by -1.
x=\frac{4y-20}{-1}
Dividing by -1 undoes the multiplication by -1.
x=20-4y
Divide -20+4y by -1.
-4y=-20+x
Add x to both sides.
-4y=x-20
The equation is in standard form.
\frac{-4y}{-4}=\frac{x-20}{-4}
Divide both sides by -4.
y=\frac{x-20}{-4}
Dividing by -4 undoes the multiplication by -4.
y=-\frac{x}{4}+5
Divide -20+x by -4.
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