(r-20)^2=r^2

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Solution for (r-20)^2=r^2 equation: 



(r-20)^2=r^2

We move all terms to the left:

(r-20)^2-(r^2)=0

determiningTheFunctionDomain
-r^2+(r-20)^2=0

We add all the numbers together, and all the variables

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

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