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13=v/2-13
We move all terms to the left:
13-(v/2-13)=0
We get rid of parentheses
-v/2+13+13=0
We multiply all the terms by the denominator
-v+13*2+13*2=0
We add all the numbers together, and all the variables
-1v+52=0
We move all terms containing v to the left, all other terms to the right
-v=-52
v=-52/-1
v=+52
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