3v-12=9v

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Solution for 3v-12=9v equation: 



3v-12=9v

We move all terms to the left:

3v-12-(9v)=0

We add all the numbers together, and all the variables

-6v-12=0

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

-6v=12

v=12/-6

v=-2

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