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16=-7v-+3v
We move all terms to the left:
16-(-7v-+3v)=0
We add all the numbers together, and all the variables
-(-4v)+16=0
We get rid of parentheses
4v+16=0
We move all terms containing v to the left, all other terms to the right
4v=-16
v=-16/4
v=-4
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