15n+6n=120

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Solution for 15n+6n=120 equation: 



15n+6n=120

We move all terms to the left:

15n+6n-(120)=0

We add all the numbers together, and all the variables

21n-120=0

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

21n=120

n=120/21

n=5+5/7

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