Solve for x
x=-\frac{5y}{4}+5
Solve for y
y=-\frac{4x}{5}+4
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4x-20=-5y
Subtract 5y from both sides. Anything subtracted from zero gives its negation.
4x=-5y+20
Add 20 to both sides.
4x=20-5y
The equation is in standard form.
\frac{4x}{4}=\frac{20-5y}{4}
Divide both sides by 4.
x=\frac{20-5y}{4}
Dividing by 4 undoes the multiplication by 4.
x=-\frac{5y}{4}+5
Divide -5y+20 by 4.
5y-20=-4x
Subtract 4x from both sides. Anything subtracted from zero gives its negation.
5y=-4x+20
Add 20 to both sides.
5y=20-4x
The equation is in standard form.
\frac{5y}{5}=\frac{20-4x}{5}
Divide both sides by 5.
y=\frac{20-4x}{5}
Dividing by 5 undoes the multiplication by 5.
y=-\frac{4x}{5}+4
Divide -4x+20 by 5.
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