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-7v+3(v+7)=29
We move all terms to the left:
-7v+3(v+7)-(29)=0
We multiply parentheses
-7v+3v+21-29=0
We add all the numbers together, and all the variables
-4v-8=0
We move all terms containing v to the left, all other terms to the right
-4v=8
v=8/-4
v=-2
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