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18=-5v+3(v+4)
We move all terms to the left:
18-(-5v+3(v+4))=0
We calculate terms in parentheses: -(-5v+3(v+4)), so:We get rid of parentheses
-5v+3(v+4)
We multiply parentheses
-5v+3v+12
We add all the numbers together, and all the variables
-2v+12
Back to the equation:
-(-2v+12)
2v-12+18=0
We add all the numbers together, and all the variables
2v+6=0
We move all terms containing v to the left, all other terms to the right
2v=-6
v=-6/2
v=-3
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