42+3n=15

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Solution for 42+3n=15 equation: 



42+3n=15

We move all terms to the left:

42+3n-(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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