[wp31s] simple equation editor ?

[Stephan2]

It would be a numerical approximation - basically a simplified version of the SLV
command available on the 34s and many other calcs.

The calculator just prompts for numbers and substitutes these for the variables. It
then solves using the algorithm used eg. in the 34s. The values chosen by the solve
algorithm then go into the remaining variable. The calc then iterates until the overall
result is close enough to zero.

The idea is to reduce complexity by avoiding full programmability in favour of a simpler
system. I believe some calcs implement this. Maybe the 33s or 35s. I don't have
neither for comparison.