6n+9n=75

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Solution for 6n+9n=75 equation: 



6n+9n=75

We move all terms to the left:

6n+9n-(75)=0

We add all the numbers together, and all the variables

15n-75=0

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

15n=75

n=75/15

n=5

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