Re: Solving multiple equations

*To*: mathgroup at smc.vnet.net*Subject*: [mg125529] Re: Solving multiple equations*From*: Bob Hanlon <hanlonr357 at gmail.com>*Date*: Sun, 18 Mar 2012 02:38:18 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <201203170752.CAA05141@smc.vnet.net>

eq1 = {0.15, 0.85, X1} == {X3, X2 + X4, X5}; eq2 = {X1 == 9/5, X4/(X3 + X4 + X5) == 1/3}; sol = Solve[Join[Thread[eq1], eq2]][[1]] {X1 -> 1.8, X3 -> 0.15, X2 -> -0.125, X4 -> 0.975, X5 -> 1.8} Bob Hanlon On Sat, Mar 17, 2012 at 3:52 AM, Themis Matsoukas <tmatsoukas at me.com> wrote: > I have two set of equations, one in the form, > > eq1 = ({0.15, 0.85, X1} == {X3, X2 + X4, X5}) > > and the other in the form > > eq2={1. X1 == 9/5, X4/(X3 + X4 + X5)==1/3} > > Solve understands both Solve[eq1] and Solve[eq2] but if I want to solve the two sets simultaneously, what is the best way to combine eq1 and eq2 into a single list of equations, either of the form of eq1 or of eq2, that Solve can understand? > > Themis >

**References**:**Solving multiple equations***From:*Themis Matsoukas <tmatsoukas@me.com>