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-45=-v/2
We move all terms to the left:
-45-(-v/2)=0
We get rid of parentheses
v/2-45=0
We multiply all the terms by the denominator
v-45*2=0
We add all the numbers together, and all the variables
v-90=0
We move all terms containing v to the left, all other terms to the right
v=90
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