0.90n=n+20

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Solution for 0.90n=n+20 equation: 



0.90n=n+20

We move all terms to the left:

0.90n-(n+20)=0

We get rid of parentheses

0.90n-n-20=0

We add all the numbers together, and all the variables

-0.1n-20=0

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

-0.1n=20

n=20/-0.1

n=-200

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