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-2=v/7-5
We move all terms to the left:
-2-(v/7-5)=0
We get rid of parentheses
-v/7+5-2=0
We multiply all the terms by the denominator
-v+5*7-2*7=0
We add all the numbers together, and all the variables
-1v+21=0
We move all terms containing v to the left, all other terms to the right
-v=-21
v=-21/-1
v=+21
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