15+5n=90

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Solution for 15+5n=90 equation: 



15+5n=90

We move all terms to the left:

15+5n-(90)=0

We add all the numbers together, and all the variables

5n-75=0

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

5n=75

n=75/5

n=15

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