7v+21=-3(v+3)

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Solution for 7v+21=-3(v+3) equation: 



7v+21=-3(v+3)

We move all terms to the left:

7v+21-(-3(v+3))=0



We calculate terms in parentheses: -(-3(v+3)), so:

-3(v+3)

We multiply parentheses

-3v-9

Back to the equation:

-(-3v-9)



We get rid of parentheses

7v+3v+9+21=0

We add all the numbers together, and all the variables

10v+30=0

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

10v=-30

v=-30/10

v=-3

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