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20=v/4+20
We move all terms to the left:
20-(v/4+20)=0
We get rid of parentheses
-v/4-20+20=0
We multiply all the terms by the denominator
-v-20*4+20*4=0
We add all the numbers together, and all the variables
-v=0
v=0/-1
v=0
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