13n-9=12

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Solution for 13n-9=12 equation: 



13n-9=12

We move all terms to the left:

13n-9-(12)=0

We add all the numbers together, and all the variables

13n-21=0

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

13n=21

n=21/13

n=1+8/13

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