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Re: symbolic evaluation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg87044] Re: symbolic evaluation
  • From: Roland Franzius <roland.franzius at uos.de>
  • Date: Sun, 30 Mar 2008 01:15:29 -0500 (EST)
  • References: <fsl267$g9p$1@smc.vnet.net>

p3aul schrieb:
> Thank you all for your answers, but they all result in Mathematica
> "solving" the equation and giving the answer 2, which is not what I
> need. What I need is for Mathematica to transpose the formula giving
> as out put x = 14/7. I beginning to believe that mathematica can't do
> it because the designer didn't put that capability in it. This must
> be a hard concept for a computer to do. It just seems simple to me.
> What's wrong with "out[1]= {{x -> 14/2}}" Which output I can't seem
> to get. 
> Paul:(

:-) Symbolize e.g as digit string to avoid the trivial evaluation 
simplifications

in: Solve["7" x == "14", x]
out: {{x -> 14/7}}

If there are many numbers you may use the rule

equation/. a_?NumberQ :> ToString[a]

-- 

Roland Franzius


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