Path: utzoo!attcan!uunet!cs.utexas.edu!usc!snorkelwacker!mit-eddie!uw-beaver!ubc-cs!van-bc!rsoft!mindlink!a309
From: a309@mindlink.UUCP (George Lin)
Newsgroups: comp.sys.handhelds
Subject: Eq. Lib. Multiple Eq. Solver --> junk?
Message-ID: <3343@mindlink.UUCP>
Date: 28 Sep 90 21:48:07 GMT
Organization: MIND LINK! - British Columbia, Canada
Lines: 34


This seems like a very simple question, but I have tried for the last 2 days to
get my 48SX w/ Equation Card (& Multiple Equation Solver) to solve a
simultaneous equation.  I can't get the thing to work.

simple example:

  'A':  '1*X+2*Y=3'
  'B':  '4*X-5*Y=6'
  'EQ' { A B }

   Ok, the correct solution is X=27/13, Y=6/13.

Now, the multiple equation solver will not solve for either X or Y (unless one
of the two variables is know).

Sure, it's easy to solve it by hand.  Maybe even rearrange equation 'A' to be
Y=f(X).

But it gets harder to do when the 2 eqation with 2 unknows are like this:

  'A':  '1*SIN(X)+2*COS(Y)=3'
  'B':  '4*SIN(Y)-5*COS(X)=6'
  'EQ': { A B }

(well, Ok, it's still not too hard to rearrange, but you know what I mean)

So, any HP gods out there know how to solve simultaneous equations (on the HP
that is)?

--------------------------------
George Lin
a309@mindlink
uunet!van-bc!rsoft!mindlink!George_Lin