21-(n-21)=7(n+5)

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Solution for 21-(n-21)=7(n+5) equation: 



21-(n-21)=7(n+5)

We move all terms to the left:

21-(n-21)-(7(n+5))=0

We get rid of parentheses

-n-(7(n+5))+21+21=0



We calculate terms in parentheses: -(7(n+5)), so:

7(n+5)

We multiply parentheses

7n+35

Back to the equation:

-(7n+35)



We add all the numbers together, and all the variables

-1n-(7n+35)+42=0

We get rid of parentheses

-1n-7n-35+42=0

We add all the numbers together, and all the variables

-8n+7=0

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

-8n=-7

n=-7/-8

n=7/8

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