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-v/2=-31
We move all terms to the left:
-v/2-(-31)=0
We add all the numbers together, and all the variables
-v/2+31=0
We multiply all the terms by the denominator
-v+31*2=0
We add all the numbers together, and all the variables
-1v+62=0
We move all terms containing v to the left, all other terms to the right
-v=-62
v=-62/-1
v=+62
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