n+0.8n=90

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Solution for n+0.8n=90 equation: 



n+0.8n=90

We move all terms to the left:

n+0.8n-(90)=0

We add all the numbers together, and all the variables

1.8n-90=0

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

1.8n=90

n=90/1.8

n=50

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