Solving with the builtin equations of the 35s  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: Solving with the builtin equations of the 35s (/thread232896.html) 
Solving with the builtin equations of the 35s  Palmer O. Hanson, Jr.  10152012 Page 76 of the 35s manual describes use of the builtin equations from the keyboard. I would like to use the "2x2 lin solve" equation in a program. How do I do that?
Re: Solving with the builtin equations of the 35s  Gene Wright  10162012 This should show how. Good to finally meet you a few weeks ago in Nashville! Re: Solving with the builtin equations of the 35s  Andrew Feist  10162012 I don't think you doI think you can only type your own equations into a program, not use the ones that are built in.
Re: Solving with the builtin equations of the 35s  Gene Wright  10162012 Ah, I misread your original question.
You cannot use one of the builtin equations in a user program. Sorry!
Re: Solving with the builtin equations of the 35s  Dieter  10172012 You cannot use equations from the 35s equation list in your own programs. But solving a 2x2 system is so trivial that it can be done in a very short user routine: RCL AThis returns the two unknowns in X and Y.
Actually you can also do this in just two lines, using the EQNfeature: ([A,D]*[F,C])/([A,B]*[E,D]>G)Type "STO G" to enter ">G". Please also note that the minuses are unary (signs, not operators). This solution also works for A=0. ;) Dieter
Edited: 17 Oct 2012, 3:28 p.m.
