Question 340424
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You are SOOOOOO close.  Consider this:  How do you compute the average?  You add up all of the items and divide by the number of items.  That means that if the average of 3 things is 20,000, then the sum of the three things has to be 60,000.


So, instead of


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ r\ +\ (r\ -\ 4000)\ +\ \frac{2}{3}r\ =\ 20,000]


You need


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ r\ +\ (r\ -\ 4000)\ +\ \frac{2}{3}r\ =\ 60,000]


I'll leave the rest to you since the solution is quite straightforward from here.  Write if you get stuck again.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
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