9=-9(v+7)

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



9=-9(v+7)

We move all terms to the left:

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



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

-9(v+7)

We multiply parentheses

-9v-63

Back to the equation:

-(-9v-63)



We get rid of parentheses

9v+63+9=0

We add all the numbers together, and all the variables

9v+72=0

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

9v=-72

v=-72/9

v=-8

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