-6v+21=-9(v+1)

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Solution for -6v+21=-9(v+1) equation: 



-6v+21=-9(v+1)

We move all terms to the left:

-6v+21-(-9(v+1))=0



We calculate terms in parentheses: -(-9(v+1)), so:

-9(v+1)

We multiply parentheses

-9v-9

Back to the equation:

-(-9v-9)



We get rid of parentheses

-6v+9v+9+21=0

We add all the numbers together, and all the variables

3v+30=0

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

3v=-30

v=-30/3

v=-10

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