-21=8(v+7)+3v

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Solution for -21=8(v+7)+3v equation: 



-21=8(v+7)+3v

We move all terms to the left:

-21-(8(v+7)+3v)=0



We calculate terms in parentheses: -(8(v+7)+3v), so:

8(v+7)+3v

We add all the numbers together, and all the variables

3v+8(v+7)

We multiply parentheses

3v+8v+56

We add all the numbers together, and all the variables

11v+56

Back to the equation:

-(11v+56)



We get rid of parentheses

-11v-56-21=0

We add all the numbers together, and all the variables

-11v-77=0

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

-11v=77

v=77/-11

v=-7

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