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-7=-v/2-4
We move all terms to the left:
-7-(-v/2-4)=0
We get rid of parentheses
v/2+4-7=0
We multiply all the terms by the denominator
v+4*2-7*2=0
We add all the numbers together, and all the variables
v-6=0
We move all terms containing v to the left, all other terms to the right
v=6
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