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-9v-47=-7(v+9)
We move all terms to the left:
-9v-47-(-7(v+9))=0
We calculate terms in parentheses: -(-7(v+9)), so:We get rid of parentheses
-7(v+9)
We multiply parentheses
-7v-63
Back to the equation:
-(-7v-63)
-9v+7v+63-47=0
We add all the numbers together, and all the variables
-2v+16=0
We move all terms containing v to the left, all other terms to the right
-2v=-16
v=-16/-2
v=+8
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