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15=-2v+7(v+5)
We move all terms to the left:
15-(-2v+7(v+5))=0
We calculate terms in parentheses: -(-2v+7(v+5)), so:We get rid of parentheses
-2v+7(v+5)
We multiply parentheses
-2v+7v+35
We add all the numbers together, and all the variables
5v+35
Back to the equation:
-(5v+35)
-5v-35+15=0
We add all the numbers together, and all the variables
-5v-20=0
We move all terms containing v to the left, all other terms to the right
-5v=20
v=20/-5
v=-4
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