30=6(n+6)-3(7+n)

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Solution for 30=6(n+6)-3(7+n) equation: 



30=6(n+6)-3(7+n)

We move all terms to the left:

30-(6(n+6)-3(7+n))=0

We add all the numbers together, and all the variables

-(6(n+6)-3(n+7))+30=0



We calculate terms in parentheses: -(6(n+6)-3(n+7)), so:

6(n+6)-3(n+7)

We multiply parentheses

6n-3n+36-21

We add all the numbers together, and all the variables

3n+15

Back to the equation:

-(3n+15)



We get rid of parentheses

-3n-15+30=0

We add all the numbers together, and all the variables

-3n+15=0

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

-3n=-15

n=-15/-3

n=+5

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