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4v+18=8v-102
We move all terms to the left:
4v+18-(8v-102)=0
We get rid of parentheses
4v-8v+102+18=0
We add all the numbers together, and all the variables
-4v+120=0
We move all terms containing v to the left, all other terms to the right
-4v=-120
v=-120/-4
v=+30
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