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-9=-7v+2(v-7)
We move all terms to the left:
-9-(-7v+2(v-7))=0
We calculate terms in parentheses: -(-7v+2(v-7)), so:We get rid of parentheses
-7v+2(v-7)
We multiply parentheses
-7v+2v-14
We add all the numbers together, and all the variables
-5v-14
Back to the equation:
-(-5v-14)
5v+14-9=0
We add all the numbers together, and all the variables
5v+5=0
We move all terms containing v to the left, all other terms to the right
5v=-5
v=-5/5
v=-1
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