12+5v=2v-(9)

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Solution for 12+5v=2v-(9) equation: 



12+5v=2v-(9)

We move all terms to the left:

12+5v-(2v-(9))=0

We get rid of parentheses

5v-2v+9+12=0

We add all the numbers together, and all the variables

3v+21=0

We move all terms containing v to the left, all other terms to the right

3v=-21

v=-21/3

v=-7

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