42=4n+3n

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Solution for 42=4n+3n equation: 



42=4n+3n

We move all terms to the left:

42-(4n+3n)=0

We add all the numbers together, and all the variables

-(+7n)+42=0

We get rid of parentheses

-7n+42=0

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

-7n=-42

n=-42/-7

n=+6

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