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v=4+2v
We move all terms to the left:
v-(4+2v)=0
We add all the numbers together, and all the variables
v-(2v+4)=0
We get rid of parentheses
v-2v-4=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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