9(n+7)=(21+3n)

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Solution for 9(n+7)=(21+3n) equation: 



9(n+7)=(21+3n)

We move all terms to the left:

9(n+7)-((21+3n))=0

We add all the numbers together, and all the variables

9(n+7)-((3n+21))=0

We multiply parentheses

9n-((3n+21))+63=0



We calculate terms in parentheses: -((3n+21)), so:

(3n+21)

We get rid of parentheses

3n+21

Back to the equation:

-(3n+21)



We get rid of parentheses

9n-3n-21+63=0

We add all the numbers together, and all the variables

6n+42=0

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

6n=-42

n=-42/6

n=-7

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