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4x=8+y
Add y to both sides.
4x=y+8
The equation is in standard form.
\frac{4x}{4}=\frac{y+8}{4}
Divide both sides by 4.
x=\frac{y+8}{4}
Dividing by 4 undoes the multiplication by 4.
x=\frac{y}{4}+2
Divide 8+y by 4.
-y=8-4x
Subtract 4x from both sides.
\frac{-y}{-1}=\frac{8-4x}{-1}
Divide both sides by -1.
y=\frac{8-4x}{-1}
Dividing by -1 undoes the multiplication by -1.
y=4x-8
Divide 8-4x by -1.