12v=12+9v

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Solution for 12v=12+9v equation: 



12v=12+9v

We move all terms to the left:

12v-(12+9v)=0

We add all the numbers together, and all the variables

12v-(9v+12)=0

We get rid of parentheses

12v-9v-12=0

We add all the numbers together, and all the variables

3v-12=0

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

3v=12

v=12/3

v=4

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