1n+2n=90

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Solution for 1n+2n=90 equation: 



1n+2n=90

We move all terms to the left:

1n+2n-(90)=0

We add all the numbers together, and all the variables

3n-90=0

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

3n=90

n=90/3

n=30

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