       Re: Solving multiple equations

• To: mathgroup at smc.vnet.net
• Subject: [mg125538] Re: Solving multiple equations
• From: Ray Koopman <koopman at sfu.ca>
• Date: Sun, 18 Mar 2012 02:41:27 -0500 (EST)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <jk1g20\$51v\$1@smc.vnet.net>

```On Mar 17, 12:55 am, Themis Matsoukas <tmatsou... 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

Join @@ Thread /@ {eq1, eq2}

{0.15 == X3, 0.85 == X2 + X4, X1 == X5,
1.*X1 == 9/5, X4/(X3 + X4 + X5) == 1/3}

```

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