1-n-3n=13

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Solution for 1-n-3n=13 equation: 



1-n-3n=13

We move all terms to the left:

1-n-3n-(13)=0

We add all the numbers together, and all the variables

-4n-12=0

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

-4n=12

n=12/-4

n=-3

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