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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