42=3(n+4)

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Solution for 42=3(n+4) equation: 



42=3(n+4)

We move all terms to the left:

42-(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+42=0

We add all the numbers together, and all the variables

-3n+30=0

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

-3n=-30

n=-30/-3

n=+10

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