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7v+5v=-2+5v+2+7v
We move all terms to the left:
7v+5v-(-2+5v+2+7v)=0
We add all the numbers together, and all the variables
7v+5v-(+12v)=0
We add all the numbers together, and all the variables
12v-(+12v)=0
We get rid of parentheses
12v-12v=0
We add all the numbers together, and all the variables
=0
v=0/1
v=0
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