12n+3n-13n-n=7

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Solution for 12n+3n-13n-n=7 equation: 



12n+3n-13n-n=7

We move all terms to the left:

12n+3n-13n-n-(7)=0

We add all the numbers together, and all the variables

n-7=0

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

n=7

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