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