3n-21=-3-6(n+6)

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Solution for 3n-21=-3-6(n+6) equation: 



3n-21=-3-6(n+6)

We move all terms to the left:

3n-21-(-3-6(n+6))=0



We calculate terms in parentheses: -(-3-6(n+6)), so:

-3-6(n+6)

determiningTheFunctionDomain
-6(n+6)-3

We multiply parentheses

-6n-36-3

We add all the numbers together, and all the variables

-6n-39

Back to the equation:

-(-6n-39)



We get rid of parentheses

3n+6n+39-21=0

We add all the numbers together, and all the variables

9n+18=0

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

9n=-18

n=-18/9

n=-2

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