-9=2v+7v

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Solution for -9=2v+7v equation: 



-9=2v+7v

We move all terms to the left:

-9-(2v+7v)=0

We add all the numbers together, and all the variables

-(+9v)-9=0

We get rid of parentheses

-9v-9=0

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

-9v=9

v=9/-9

v=-1

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