-21-6n=-7-7(-6+2n)

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Solution for -21-6n=-7-7(-6+2n) equation: 



-21-6n=-7-7(-6+2n)

We move all terms to the left:

-21-6n-(-7-7(-6+2n))=0

We add all the numbers together, and all the variables

-6n-(-7-7(2n-6))-21=0



We calculate terms in parentheses: -(-7-7(2n-6)), so:

-7-7(2n-6)

determiningTheFunctionDomain
-7(2n-6)-7

We multiply parentheses

-14n+42-7

We add all the numbers together, and all the variables

-14n+35

Back to the equation:

-(-14n+35)



We get rid of parentheses

-6n+14n-35-21=0

We add all the numbers together, and all the variables

8n-56=0

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

8n=56

n=56/8

n=7

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