21=-6n+7(n+5)

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Solution for 21=-6n+7(n+5) equation: 



21=-6n+7(n+5)

We move all terms to the left:

21-(-6n+7(n+5))=0



We calculate terms in parentheses: -(-6n+7(n+5)), so:

-6n+7(n+5)

We multiply parentheses

-6n+7n+35

We add all the numbers together, and all the variables

n+35

Back to the equation:

-(n+35)



We get rid of parentheses

-n-35+21=0

We add all the numbers together, and all the variables

-1n-14=0

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

-n=14

n=14/-1

n=-14

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