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3x-2=2-7y
Swap sides so that all variable terms are on the left hand side.
3x=2-7y+2
Add 2 to both sides.
3x=4-7y
Add 2 and 2 to get 4.
\frac{3x}{3}=\frac{4-7y}{3}
Divide both sides by 3.
x=\frac{4-7y}{3}
Dividing by 3 undoes the multiplication by 3.
-7y=3x-2-2
Subtract 2 from both sides.
-7y=3x-4
Subtract 2 from -2 to get -4.
\frac{-7y}{-7}=\frac{3x-4}{-7}
Divide both sides by -7.
y=\frac{3x-4}{-7}
Dividing by -7 undoes the multiplication by -7.
y=\frac{4-3x}{7}
Divide 3x-4 by -7.