15=3(n-4)

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Solution for 15=3(n-4) equation: 



15=3(n-4)

We move all terms to the left:

15-(3(n-4))=0



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

3(n-4)

We multiply parentheses

3n-12

Back to the equation:

-(3n-12)



We get rid of parentheses

-3n+12+15=0

We add all the numbers together, and all the variables

-3n+27=0

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

-3n=-27

n=-27/-3

n=+9

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