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-8v=8v-80
We move all terms to the left:
-8v-(8v-80)=0
We get rid of parentheses
-8v-8v+80=0
We add all the numbers together, and all the variables
-16v+80=0
We move all terms containing v to the left, all other terms to the right
-16v=-80
v=-80/-16
v=+5
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