9v-1=-7(v-9)

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Solution for 9v-1=-7(v-9) equation: 



9v-1=-7(v-9)

We move all terms to the left:

9v-1-(-7(v-9))=0



We calculate terms in parentheses: -(-7(v-9)), so:

-7(v-9)

We multiply parentheses

-7v+63

Back to the equation:

-(-7v+63)



We get rid of parentheses

9v+7v-63-1=0

We add all the numbers together, and all the variables

16v-64=0

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

16v=64

v=64/16

v=4

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