Solve for x
x=2\left(y+10\right)
Solve for y
y=\frac{x-20}{2}
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x-20=2y
Add 2y to both sides. Anything plus zero gives itself.
x=2y+20
Add 20 to both sides.
-2y-20=-x
Subtract x from both sides. Anything subtracted from zero gives its negation.
-2y=-x+20
Add 20 to both sides.
-2y=20-x
The equation is in standard form.
\frac{-2y}{-2}=\frac{20-x}{-2}
Divide both sides by -2.
y=\frac{20-x}{-2}
Dividing by -2 undoes the multiplication by -2.
y=\frac{x}{2}-10
Divide -x+20 by -2.
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