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15v-81=2v+23
We move all terms to the left:
15v-81-(2v+23)=0
We get rid of parentheses
15v-2v-23-81=0
We add all the numbers together, and all the variables
13v-104=0
We move all terms containing v to the left, all other terms to the right
13v=104
v=104/13
v=8
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