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12-2v=7-v
We simplify the equation to the form, which is simple to understand
12-2v=7-v
We move all terms containing v to the left and all other terms to the right.
-2v+1v=+7-12
We simplify left and right side of the equation.
-1v=-5
We divide both sides of the equation by -1 to get v.
v=5
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