Find an expression

robban96

New member
Joined
Oct 27, 2014
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3
I have been working with this problem for a while now and gotten nowhere. I'am going to use it for my astronomical project.

Equation one: c-b = b-a
Equation two: b/a = 3^(x-z)
Equation three: c/a = 3^(x-y)

Find an expression that gives z(x,y)
 
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