30=3(n+7)

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Solution for 30=3(n+7) equation: 



30=3(n+7)

We move all terms to the left:

30-(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+30=0

We add all the numbers together, and all the variables

-3n+9=0

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

-3n=-9

n=-9/-3

n=+3

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