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Re: what is my error?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg100459] Re: [mg100438] what is my error?
  • From: Adriano Pascoletti <adriano.pascoletti at dimi.uniud.it>
  • Date: Thu, 4 Jun 2009 06:33:04 -0400 (EDT)
  • References: <200906040731.DAA11724@smc.vnet.net>

Your equations are linearly dependent

In[6]:= Reduce[eqns]
Out[6]= mp == 13 - mr && fr == 15 - mr && fp == 4 + mr


Adriano Pascoletti

2009/6/4 Richard Palmer <rhpalmer at gmail.com>

> eqns = {mr + mp == 13, fr + fp == 19, mr + fr == 15, mp + fp ==
> 17}NSolve[eqns,
> {mr, mp, fr, fp}]
>
> gives {{mr->-4.+1. fp,mp->17.-1. fp,fr->19.-1. fp}}
>
> The solution is  {mr->8, mp->5, fr->7, fp->12} if mr,mp,fr,fp are greater
> than zero
>
> --
> Richard Palmer
>


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