15-13n+6n+12n=75

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Solution for 15-13n+6n+12n=75 equation: 



15-13n+6n+12n=75

We move all terms to the left:

15-13n+6n+12n-(75)=0

We add all the numbers together, and all the variables

5n-60=0

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

5n=60

n=60/5

n=12

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