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MathGroup Archive 2007

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Re: Manupulation of equations in Mathematica

  • To: mathgroup at smc.vnet.net
  • Subject: [mg75838] Re: Manupulation of equations in Mathematica
  • From: dh <dh at metrohm.ch>
  • Date: Fri, 11 May 2007 06:21:08 -0400 (EDT)
  • References: <f21drt$6am$1@smc.vnet.net>


Hi Ger,

you could e.g. use Solve, like:

eq=2+R Cc+R Bc\[Equal]Ac R

res=Solve[eq,R]

if you do not like the format of the anser, you can change it by e.g.:

res[[1,1]]/.Rule\[Rule]Equal

Another option is to change the equation manually. E.g::

t={eq[[1]],eq[[2]]}

t=t-R Bc

t=Factor[t]

t=t/(Ac-Bc)

if you do not like the format, we can change it:

Equal[t[[2]], t[[1]]]

hope this helps, Daniel



G de Graaf wrote:

> Hello,

> 

> I have a question about the presentation 

> of equations:

> 

> As the result of a large set of equations 

> I get a complicated eqn.

> 

> Let's assume a simple one:

> 

>   2 + R Cc + R Bc == Ac R

> 

> Now I want to tell Mathematica to write 

> this equation in a readable form for me:

> 

> R = ..........

> 

> Any idea how to do this ??

> 

> Thanx,

> 

> Ger de Graaf

> Delft University of Technology

> 

> .

> 




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