-12=2(3n+3)-2(-2n-1)

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Solution for -12=2(3n+3)-2(-2n-1) equation: 



-12=2(3n+3)-2(-2n-1)

We move all terms to the left:

-12-(2(3n+3)-2(-2n-1))=0



We calculate terms in parentheses: -(2(3n+3)-2(-2n-1)), so:

2(3n+3)-2(-2n-1)

We multiply parentheses

6n+4n+6+2

We add all the numbers together, and all the variables

10n+8

Back to the equation:

-(10n+8)



We get rid of parentheses

-10n-8-12=0

We add all the numbers together, and all the variables

-10n-20=0

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

-10n=20

n=20/-10

n=-2

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