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5n(20+n)n=1.5
We move all terms to the left:
5n(20+n)n-(1.5)=0
We add all the numbers together, and all the variables
5n(n+20)n-(1.5)=0
We add all the numbers together, and all the variables
5n(n+20)n-1.5=0
We multiply parentheses
5n^3+100n^2-1.5=0
We do not support enpression: n^3
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