20-5n=90

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Solution for 20-5n=90 equation: 



20-5n=90

We move all terms to the left:

20-5n-(90)=0

We add all the numbers together, and all the variables

-5n-70=0

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

-5n=70

n=70/-5

n=-14

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