Re: question: re-organising equations

*To*: mathgroup at smc.vnet.net*Subject*: [mg55229] Re: [mg55179] question: re-organising equations*From*: DrBob <drbob at bigfoot.com>*Date*: Thu, 17 Mar 2005 03:29:00 -0500 (EST)*References*: <200503161035.FAA23761@smc.vnet.net>*Reply-to*: drbob at bigfoot.com*Sender*: owner-wri-mathgroup at wolfram.com

> May I trouble you for some suggestions as to how this > can be achieved? If the equations are badly non-linear, it probably can't. If it can be done at all, methods will depend on the function f; details are everything. You can try this, however: Solve[x == f[a,b,c,d],{a,b,c,d}] There are also other options such as Reduce, SolveAlways, and FindInstance. Once you've solved for x, of course y == z == w == x. Bobby On Wed, 16 Mar 2005 05:35:54 -0500 (EST), OneTel <david.hanson at student.unsw.edu.au> wrote: > > > I have a set of simultaneous equations which are very long and so I will > not include them here. They take the form of: > > x = f(A,B,C,D) > y = f(A,B,C,D) > z = f(A,B,C,D) > w = f(A,B,C,D) > > I would like to re-organise these into the form: > A = f(x,y,z,w) > B = f(x,y,z,w) > C = f(x,y,z,w) > D = f(x,y,z,w) > > May I trouble you for some suggestions as to how this can be achieved? > > > Thank you, > > David Hanson > Research Postgraduate > UNSW, Kensington 2052 NSW > > > > -- DrBob at bigfoot.com

**References**:**question: re-organising equations***From:*"OneTel" <david.hanson@student.unsw.edu.au>