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-21=v/17
We move all terms to the left:
-21-(v/17)=0
We add all the numbers together, and all the variables
-(+v/17)-21=0
We get rid of parentheses
-v/17-21=0
We multiply all the terms by the denominator
-v-21*17=0
We add all the numbers together, and all the variables
-1v-357=0
We move all terms containing v to the left, all other terms to the right
-v=357
v=357/-1
v=-357
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