Sorry, in writing down the problem and the corresponding solution, I
made a mistake. It's evident, but anyway...
Wrong:
> # ab * cb = dab 35 * 26 = 936
> # + + - + + -
> # ifd + chg = eaf179 + 258 = 437
> # ------
Another math problem easier to solve by hand, but, IMHO, difficult to
program in a concise way like the solution of Bill Mill
(linalg_brute.py) to the problem of engsol.
I appreciated very much the Bill Mill's solution and that inspired in
a certain way the solution for my problem.
# Proble
