-21=-7(v+6)

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Solution for -21=-7(v+6) equation: 



-21=-7(v+6)

We move all terms to the left:

-21-(-7(v+6))=0



We calculate terms in parentheses: -(-7(v+6)), so:

-7(v+6)

We multiply parentheses

-7v-42

Back to the equation:

-(-7v-42)



We get rid of parentheses

7v+42-21=0

We add all the numbers together, and all the variables

7v+21=0

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

7v=-21

v=-21/7

v=-3

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