Strange RREF (HP 50g)

[peacecalc]

Hello Juan14,

I replaced the approach using RREF with the Cramer's Rule and get for over 600 solvings of systems with three unknowns (inclusive checking wether DET is zero or not) a calculation time of ca. 6 minutes (with RREF I get 4 times more). That is sufficient fast enough for my purposes.

But anyway, thank you very much for your help.

Greetings
peacecalc