9v-21=-6(v-4)

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Solution for 9v-21=-6(v-4) equation: 



9v-21=-6(v-4)

We move all terms to the left:

9v-21-(-6(v-4))=0



We calculate terms in parentheses: -(-6(v-4)), so:

-6(v-4)

We multiply parentheses

-6v+24

Back to the equation:

-(-6v+24)



We get rid of parentheses

9v+6v-24-21=0

We add all the numbers together, and all the variables

15v-45=0

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

15v=45

v=45/15

v=3

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