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-3(2-4v)=-78
We move all terms to the left:
-3(2-4v)-(-78)=0
We add all the numbers together, and all the variables
-3(-4v+2)-(-78)=0
We add all the numbers together, and all the variables
-3(-4v+2)+78=0
We multiply parentheses
12v-6+78=0
We add all the numbers together, and all the variables
12v+72=0
We move all terms containing v to the left, all other terms to the right
12v=-72
v=-72/12
v=-6
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