Mathematica 9 is now available
Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2012

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: simple equation substitutions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg128550] Re: simple equation substitutions
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Fri, 2 Nov 2012 00:46:26 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • Delivered-to: l-mathgroup@wolfram.com
  • Delivered-to: mathgroup-newout@smc.vnet.net
  • Delivered-to: mathgroup-newsend@smc.vnet.net
  • References: <20121101071928.99D326857@smc.vnet.net>

Try Reduce instead of Solve.

On Nov 1, 2012, at 3:19 AM, Neal Becker <ndbecker2 at gmail.com> wrote:

> {y == x + 2, x == 7}
>
> Solve[%, y]
>
> -> {}
>
> What I expected to happen is have x->7 applied to y == x+2.
>
> My real plan is to develop a list of (a lot more complicated) expressions that will have repeated substitutions applied.
>
> Why didn't the above work and/or what should I do instead?

---
Murray Eisenberg                                    
murray at math.umass.edu
Mathematics & Statistics Dept.      
Lederle Graduate Research Tower            phone 413 549-1020 (H)
University of Massachusetts                               413 545-2838 (W)
710 North Pleasant Street                         fax   413 545-1801
Amherst, MA 01003-9305








  • Prev by Date: Re: CDF Security
  • Next by Date: Re: Solve...or not
  • Previous by thread: Re: simple equation substitutions
  • Next by thread: Re: [newb] simple equation substitutions