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13=10+v-8/2
We move all terms to the left:
13-(10+v-8/2)=0
We add all the numbers together, and all the variables
-(v+6)+13=0
We get rid of parentheses
-v-6+13=0
We add all the numbers together, and all the variables
-1v+7=0
We move all terms containing v to the left, all other terms to the right
-v=-7
v=-7/-1
v=+7
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