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3v+3=81+v
We move all terms to the left:
3v+3-(81+v)=0
We add all the numbers together, and all the variables
3v-(v+81)+3=0
We get rid of parentheses
3v-v-81+3=0
We add all the numbers together, and all the variables
2v-78=0
We move all terms containing v to the left, all other terms to the right
2v=78
v=78/2
v=39
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