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Re: How to get Mathematica to solve for "nonbasic variables"?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg42380] Re: [mg42359] How to get Mathematica to solve for "nonbasic variables"?
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Thu, 3 Jul 2003 06:10:34 -0400 (EDT)
  • Organization: Mathematics & Statistics, Univ. of Mass./Amherst
  • References: <200307021036.GAA15750@smc.vnet.net>
  • Reply-to: murray at math.umass.edu
  • Sender: owner-wri-mathgroup at wolfram.com

   Solve[{5x == 6y, z == x/y}, z]
{{z -> 6/5}}

cdj wrote:
> Hi all,
> 
> Intuitively, I'd like to get Mathematica to compute things of the following
> sort:
> 
> In: Solve[5x==6y,x/y]
> 
> Out: {x/y -> 5/6}
> 
> Of course Mathematica won't do this - and several obvious variations on this
> theme don't seem to work either (e.g., introducing a new variable z =
> x/y, and attempting to solve the system for z).
> 
> So what's the easiest way to solve (systems of) equations for
> nonatomic variables of this sort?
> 
> Thanks for any suggestions,
> 
> cdj
> 
> 

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Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
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University of Massachusetts                413 545-2859 (W)
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Amherst, MA 01003-9305


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