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-6(-v-7)+v=84
We move all terms to the left:
-6(-v-7)+v-(84)=0
We add all the numbers together, and all the variables
-6(-1v-7)+v-84=0
We add all the numbers together, and all the variables
v-6(-1v-7)-84=0
We multiply parentheses
v+6v+42-84=0
We add all the numbers together, and all the variables
7v-42=0
We move all terms containing v to the left, all other terms to the right
7v=42
v=42/7
v=6
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