Re: Setting up equations
- To: mathgroup at smc.vnet.net
- Subject: [mg66016] Re: [mg65990] Setting up equations
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Thu, 27 Apr 2006 02:26:00 -0400 (EDT)
- References: <200604260837.EAA02689@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
eqn=5 x+6 y+7 z==a x+b y+c z;
Solve[Equal@@
(Flatten[CoefficientList[#,{x,y,z}]]&/@
List@@eqn),{a,b,c}]
{{a -> 5, b -> 6, c -> 7}}
Bob Hanlon
hanlonr at cox.net
On Apr 26, 2006, at 4:37 AM, 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?
>
- References:
- Setting up equations
- From: Yaroslav Bulatov <yaroslavvb@gmail.com>
- Setting up equations