90n-20=250

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Solution for 90n-20=250 equation: 



90n-20=250

We move all terms to the left:

90n-20-(250)=0

We add all the numbers together, and all the variables

90n-270=0

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

90n=270

n=270/90

n=3

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