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