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2v-18=4(v-9)
We move all terms to the left:
2v-18-(4(v-9))=0
We calculate terms in parentheses: -(4(v-9)), so:We get rid of parentheses
4(v-9)
We multiply parentheses
4v-36
Back to the equation:
-(4v-36)
2v-4v+36-18=0
We add all the numbers together, and all the variables
-2v+18=0
We move all terms containing v to the left, all other terms to the right
-2v=-18
v=-18/-2
v=+9
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