3v+9+5v=v-12

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Solution for 3v+9+5v=v-12 equation: 



3v+9+5v=v-12

We move all terms to the left:

3v+9+5v-(v-12)=0

We add all the numbers together, and all the variables

8v-(v-12)+9=0

We get rid of parentheses

8v-v+12+9=0

We add all the numbers together, and all the variables

7v+21=0

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

7v=-21

v=-21/7

v=-3

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