3v+6v=-21

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Solution for 3v+6v=-21 equation: 



3v+6v=-21

We move all terms to the left:

3v+6v-(-21)=0

We add all the numbers together, and all the variables

9v+21=0

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

9v=-21

v=-21/9

v=-2+1/3

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