84=-3(-4+3n)

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Solution for 84=-3(-4+3n) equation: 



84=-3(-4+3n)

We move all terms to the left:

84-(-3(-4+3n))=0

We add all the numbers together, and all the variables

-(-3(3n-4))+84=0



We calculate terms in parentheses: -(-3(3n-4)), so:

-3(3n-4)

We multiply parentheses

-9n+12

Back to the equation:

-(-9n+12)



We get rid of parentheses

9n-12+84=0

We add all the numbers together, and all the variables

9n+72=0

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

9n=-72

n=-72/9

n=-8

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