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13v+9-4v=5(v+5)
We move all terms to the left:
13v+9-4v-(5(v+5))=0
We add all the numbers together, and all the variables
9v-(5(v+5))+9=0
We calculate terms in parentheses: -(5(v+5)), so:We get rid of parentheses
5(v+5)
We multiply parentheses
5v+25
Back to the equation:
-(5v+25)
9v-5v-25+9=0
We add all the numbers together, and all the variables
4v-16=0
We move all terms containing v to the left, all other terms to the right
4v=16
v=16/4
v=4
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