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12=2+v
We move all terms to the left:
12-(2+v)=0
We add all the numbers together, and all the variables
-(v+2)+12=0
We get rid of parentheses
-v-2+12=0
We add all the numbers together, and all the variables
-1v+10=0
We move all terms containing v to the left, all other terms to the right
-v=-10
v=-10/-1
v=+10
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