-9v-21=-3(v-9)

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Solution for -9v-21=-3(v-9) equation: 



-9v-21=-3(v-9)

We move all terms to the left:

-9v-21-(-3(v-9))=0



We calculate terms in parentheses: -(-3(v-9)), so:

-3(v-9)

We multiply parentheses

-3v+27

Back to the equation:

-(-3v+27)



We get rid of parentheses

-9v+3v-27-21=0

We add all the numbers together, and all the variables

-6v-48=0

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

-6v=48

v=48/-6

v=-8

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