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-8v+4(v+4)=4
We move all terms to the left:
-8v+4(v+4)-(4)=0
We multiply parentheses
-8v+4v+16-4=0
We add all the numbers together, and all the variables
-4v+12=0
We move all terms containing v to the left, all other terms to the right
-4v=-12
v=-12/-4
v=+3
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