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-3=12-4V
We move all terms to the left:
-3-(12-4V)=0
We add all the numbers together, and all the variables
-(-4V+12)-3=0
We get rid of parentheses
4V-12-3=0
We add all the numbers together, and all the variables
4V-15=0
We move all terms containing V to the left, all other terms to the right
4V=15
V=15/4
V=3+3/4
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