7v+21=-7(v-9)

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Solution for 7v+21=-7(v-9) equation: 



7v+21=-7(v-9)

We move all terms to the left:

7v+21-(-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

7v+7v-63+21=0

We add all the numbers together, and all the variables

14v-42=0

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

14v=42

v=42/14

v=3

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