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3=v/12+12
We move all terms to the left:
3-(v/12+12)=0
We get rid of parentheses
-v/12-12+3=0
We multiply all the terms by the denominator
-v-12*12+3*12=0
We add all the numbers together, and all the variables
-1v-108=0
We move all terms containing v to the left, all other terms to the right
-v=108
v=108/-1
v=-108
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