-21=4(v+7)+3v

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Solution for -21=4(v+7)+3v equation: 



-21=4(v+7)+3v

We move all terms to the left:

-21-(4(v+7)+3v)=0



We calculate terms in parentheses: -(4(v+7)+3v), so:

4(v+7)+3v

We add all the numbers together, and all the variables

3v+4(v+7)

We multiply parentheses

3v+4v+28

We add all the numbers together, and all the variables

7v+28

Back to the equation:

-(7v+28)



We get rid of parentheses

-7v-28-21=0

We add all the numbers together, and all the variables

-7v-49=0

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

-7v=49

v=49/-7

v=-7

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