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3(v-7)-8v=4
We move all terms to the left:
3(v-7)-8v-(4)=0
We add all the numbers together, and all the variables
-8v+3(v-7)-4=0
We multiply parentheses
-8v+3v-21-4=0
We add all the numbers together, and all the variables
-5v-25=0
We move all terms containing v to the left, all other terms to the right
-5v=25
v=25/-5
v=-5
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