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8=-1+v
We move all terms to the left:
8-(-1+v)=0
We add all the numbers together, and all the variables
-(v-1)+8=0
We get rid of parentheses
-v+1+8=0
We add all the numbers together, and all the variables
-1v+9=0
We move all terms containing v to the left, all other terms to the right
-v=-9
v=-9/-1
v=+9
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