-4n-21=-5n-6(6-n)

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Solution for -4n-21=-5n-6(6-n) equation: 



-4n-21=-5n-6(6-n)

We move all terms to the left:

-4n-21-(-5n-6(6-n))=0

We add all the numbers together, and all the variables

-4n-(-5n-6(-1n+6))-21=0



We calculate terms in parentheses: -(-5n-6(-1n+6)), so:

-5n-6(-1n+6)

We multiply parentheses

-5n+6n-36

We add all the numbers together, and all the variables

n-36

Back to the equation:

-(n-36)



We get rid of parentheses

-4n-n+36-21=0

We add all the numbers together, and all the variables

-5n+15=0

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

-5n=-15

n=-15/-5

n=+3

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