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MathGroup Archive 2006

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Re: Setting up equations

  • To: mathgroup at smc.vnet.net
  • Subject: [mg66020] Re: [mg65990] Setting up equations
  • From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
  • Date: Thu, 27 Apr 2006 02:26:10 -0400 (EDT)
  • References: <200604260837.EAA02689@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

On 26 Apr 2006, at 17:37, Yaroslav Bulatov wrote:

> I'm trying to do things of the form
> Solve[5 x + 6 y + 7 z == a x + b y + c z, {a, b, c}]
>
> But since x,y,z are variables, what I really mean is
> Solve[5==a && 6==b && 7==c], so I need to convert to this form
>
> If I only have one variable, the following does what I need
>
> LogicalExpand[a*x + b*x^2 + O[x]^3 == 2*x + 3*x^2 + O[x]^3]
>
> But what to do if I have several variables?
>

Dy you mean


SolveAlways[5*x + 6*y + 7*z == a*x + b*y + c*z, {x, y, z}]

{{a -> 5, b -> 6, c -> 7}}


?

Andrzej Kozlowski


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