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12=12+v-8/2
We move all terms to the left:
12-(12+v-8/2)=0
We add all the numbers together, and all the variables
-(v+8)+12=0
We get rid of parentheses
-v-8+12=0
We add all the numbers together, and all the variables
-1v+4=0
We move all terms containing v to the left, all other terms to the right
-v=-4
v=-4/-1
v=+4
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