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