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8v-87=5v-45
We move all terms to the left:
8v-87-(5v-45)=0
We get rid of parentheses
8v-5v+45-87=0
We add all the numbers together, and all the variables
3v-42=0
We move all terms containing v to the left, all other terms to the right
3v=42
v=42/3
v=14
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