Solve for v
v=3
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-20=7-9v
Subtract 20 from 0 to get -20.
7-9v=-20
Swap sides so that all variable terms are on the left hand side.
-9v=-20-7
Subtract 7 from both sides.
-9v=-27
Subtract 7 from -20 to get -27.
v=\frac{-27}{-9}
Divide both sides by -9.
v=3
Divide -27 by -9 to get 3.
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