What I really need is to solve the system for s but solve([%% 6, %% 7],
[s]) also gave me an empty list. I only added t because in Mathematica
Reduce[{%7, %8}, {s, t}] gives several solutions one of which contains the
sought equation for s [but after replacing k with n*m beforehand]. [s,
exp(-k*t/m)] suggested by you gives the equation (6) solved for exp(-k*t/m)
which is not what I want.
On Saturday, August 1, 2020 at 4:24:05 PM UTC+5, Waldek Hebisch wrote:
>
>
> This is limitation of current solver, it can not do much
> in multivariate case when there are transcendental functions.
>
> In this case substituting variable for 'exp(-k*t/m)' or
> just command like:
>
> solve(..., [s, exp(-k*t/m)])
>
> works.
>
> --
> Waldek Hebisch
>
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