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5v-49=9(v-9)
We move all terms to the left:
5v-49-(9(v-9))=0
We calculate terms in parentheses: -(9(v-9)), so:We get rid of parentheses
9(v-9)
We multiply parentheses
9v-81
Back to the equation:
-(9v-81)
5v-9v+81-49=0
We add all the numbers together, and all the variables
-4v+32=0
We move all terms containing v to the left, all other terms to the right
-4v=-32
v=-32/-4
v=+8
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