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>