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-12=5(v-4)-7v
We move all terms to the left:
-12-(5(v-4)-7v)=0
We calculate terms in parentheses: -(5(v-4)-7v), so:We get rid of parentheses
5(v-4)-7v
We add all the numbers together, and all the variables
-7v+5(v-4)
We multiply parentheses
-7v+5v-20
We add all the numbers together, and all the variables
-2v-20
Back to the equation:
-(-2v-20)
2v+20-12=0
We add all the numbers together, and all the variables
2v+8=0
We move all terms containing v to the left, all other terms to the right
2v=-8
v=-8/2
v=-4
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