3n-18=90

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Solution for 3n-18=90 equation: 



3n-18=90

We move all terms to the left:

3n-18-(90)=0

We add all the numbers together, and all the variables

3n-108=0

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

3n=108

n=108/3

n=36

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