13n=42-81

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Solution for 13n=42-81 equation: 



13n=42-81

We move all terms to the left:

13n-(42-81)=0

We add all the numbers together, and all the variables

13n-(-39)=0

We add all the numbers together, and all the variables

13n+39=0

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

13n=-39

n=-39/13

n=-3

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