0=-3(n+7)

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Solution for 0=-3(n+7) equation: 



0=-3(n+7)

We move all terms to the left:

0-(-3(n+7))=0

We add all the numbers together, and all the variables

-(-3(n+7))=0



We calculate terms in parentheses: -(-3(n+7)), so:

-3(n+7)

We multiply parentheses

-3n-21

Back to the equation:

-(-3n-21)



We get rid of parentheses

3n+21=0

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

3n=-21

n=-21/3

n=-7

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