Dominique

THANK YOU!  Without or without declaring x your way works!!!!

This...

var("y C")
solve( log(y) == C + log(x) + log(y-1),x)
solve( x == y/(y*e^C - e^C), y)

Gives...

[y == x*e^C/(x*e^C - 1)]

What is amazing is that simply having y appear in 2 places makes it
unsolvable directly without solving for x first.
What if my equation did not have the option of solving for x first?  Is it
normal for "simple" nonlinear equations
to be unsolvable systematically?  I wouldn't be surprised if it wasn't
Sage's fault and there simply isn't
a foolproof systematic way to solve log equations but not sure.

cs

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