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15v+19=-20+2v
We move all terms to the left:
15v+19-(-20+2v)=0
We add all the numbers together, and all the variables
15v-(2v-20)+19=0
We get rid of parentheses
15v-2v+20+19=0
We add all the numbers together, and all the variables
13v+39=0
We move all terms containing v to the left, all other terms to the right
13v=-39
v=-39/13
v=-3
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