3v+15+2v=-4v-21

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Solution for 3v+15+2v=-4v-21 equation: 



3v+15+2v=-4v-21

We move all terms to the left:

3v+15+2v-(-4v-21)=0

We add all the numbers together, and all the variables

5v-(-4v-21)+15=0

We get rid of parentheses

5v+4v+21+15=0

We add all the numbers together, and all the variables

9v+36=0

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

9v=-36

v=-36/9

v=-4

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