9n+1+n=90

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Solution for 9n+1+n=90 equation: 



9n+1+n=90

We move all terms to the left:

9n+1+n-(90)=0

We add all the numbers together, and all the variables

10n-89=0

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

10n=89

n=89/10

n=8+9/10

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