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-v+5+4v=12+5v+3
We move all terms to the left:
-v+5+4v-(12+5v+3)=0
We add all the numbers together, and all the variables
-v+4v-(5v+15)+5=0
We add all the numbers together, and all the variables
3v-(5v+15)+5=0
We get rid of parentheses
3v-5v-15+5=0
We add all the numbers together, and all the variables
-2v-10=0
We move all terms containing v to the left, all other terms to the right
-2v=10
v=10/-2
v=-5
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