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2v=-v-9
We move all terms to the left:
2v-(-v-9)=0
We add all the numbers together, and all the variables
2v-(-1v-9)=0
We get rid of parentheses
2v+1v+9=0
We add all the numbers together, and all the variables
3v+9=0
We move all terms containing v to the left, all other terms to the right
3v=-9
v=-9/3
v=-3
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