9n+4n-8=31

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Solution for 9n+4n-8=31 equation: 



9n+4n-8=31

We move all terms to the left:

9n+4n-8-(31)=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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