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-71=9-8v
We move all terms to the left:
-71-(9-8v)=0
We add all the numbers together, and all the variables
-(-8v+9)-71=0
We get rid of parentheses
8v-9-71=0
We add all the numbers together, and all the variables
8v-80=0
We move all terms containing v to the left, all other terms to the right
8v=80
v=80/8
v=10
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