algebra by stages

tryingtoexcelatmath

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Sorry, seemed to have posted the same one a few times.
 

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working backwards

Hi Everyone,

I've been trying to work backwards on a problem for some time now.

I have attached the excel sheet here, I've got no problems working fowards but am having some difficulties working backwards.
 

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Algebra for a pipeline

Hi Everyone,

I am trying to work backwards algebraically on a problem here. I have attached the file as it explains better than I can in words.

I basically have a sort of pipeline where I go through different stages of wins and cancellations.

For example: I start with a value of 100 and if I win approx 20% then the following value will be 100*20% = 20, from this 20 it then goes through stages of cancellation i.e. 20% cancellation = 20 * (1-20%) = 16

I have written the equation going forwards but I am having some trouble moving backwards, seems my algebra is not up to par.

Any help would be really appreciated.

Please see the file as it would be easier to see it mathematically than just through my simple example above.

Thank you very much in advanceView attachment Math Help (1).zip
 
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