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4v-28=-2(v-7)
We move all terms to the left:
4v-28-(-2(v-7))=0
We calculate terms in parentheses: -(-2(v-7)), so:We get rid of parentheses
-2(v-7)
We multiply parentheses
-2v+14
Back to the equation:
-(-2v+14)
4v+2v-14-28=0
We add all the numbers together, and all the variables
6v-42=0
We move all terms containing v to the left, all other terms to the right
6v=42
v=42/6
v=7
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