-39=7v-21-4v

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Solution for -39=7v-21-4v equation: 



-39=7v-21-4v

We move all terms to the left:

-39-(7v-21-4v)=0

We add all the numbers together, and all the variables

-(3v-21)-39=0

We get rid of parentheses

-3v+21-39=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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