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n+(.15n)=90
We move all terms to the left:
n+(.15n)-(90)=0
We add all the numbers together, and all the variables
n+(+.15n)-90=0
We get rid of parentheses
n+.15n-90=0
We add all the numbers together, and all the variables
1.15n-90=0
We move all terms containing n to the left, all other terms to the right
1.15n=90
n=90/1.15
n=78+0.30000000000001/1.15
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