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20=2v+8
We move all terms to the left:
20-(2v+8)=0
We get rid of parentheses
-2v-8+20=0
We add all the numbers together, and all the variables
-2v+12=0
We move all terms containing v to the left, all other terms to the right
-2v=-12
v=-12/-2
v=+6
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