-9=-8v+3(v+7)

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Solution for -9=-8v+3(v+7) equation: 



-9=-8v+3(v+7)

We move all terms to the left:

-9-(-8v+3(v+7))=0



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

-8v+3(v+7)

We multiply parentheses

-8v+3v+21

We add all the numbers together, and all the variables

-5v+21

Back to the equation:

-(-5v+21)



We get rid of parentheses

5v-21-9=0

We add all the numbers together, and all the variables

5v-30=0

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

5v=30

v=30/5

v=6

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