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-4-8v=-7v-5
We move all terms to the left:
-4-8v-(-7v-5)=0
We get rid of parentheses
-8v+7v+5-4=0
We add all the numbers together, and all the variables
-1v+1=0
We move all terms containing v to the left, all other terms to the right
-v=-1
v=-1/-1
v=1
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