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-7v+37=-3(v-7)
We move all terms to the left:
-7v+37-(-3(v-7))=0
We calculate terms in parentheses: -(-3(v-7)), so:We get rid of parentheses
-3(v-7)
We multiply parentheses
-3v+21
Back to the equation:
-(-3v+21)
-7v+3v-21+37=0
We add all the numbers together, and all the variables
-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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