-21-6v=-9v-3

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Solution for -21-6v=-9v-3 equation: 



-21-6v=-9v-3

We move all terms to the left:

-21-6v-(-9v-3)=0

We get rid of parentheses

-6v+9v+3-21=0

We add all the numbers together, and all the variables

3v-18=0

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

3v=18

v=18/3

v=6

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