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7(v+9)+5v=0
We add all the numbers together, and all the variables
5v+7(v+9)=0
We multiply parentheses
5v+7v+63=0
We add all the numbers together, and all the variables
12v+63=0
We move all terms containing v to the left, all other terms to the right
12v=-63
v=-63/12
v=-5+1/4
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