240=1/20r^2+r

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Solution for 240=1/20r^2+r equation: 



240=1/20r^2+r

We move all terms to the left:

240-(1/20r^2+r)=0



Domain of the equation: 20r^2+r)!=0

r∈R



We get rid of parentheses

-1/20r^2-r+240=0

We multiply all the terms by the denominator


-r*20r^2+240*20r^2-1=0

Wy multiply elements

-20r^3+4800r^2-1=0

We do not support erpression: r^3

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