Re: New user: Abs[] problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg50120] Re: [mg50079] New user: Abs[] problem*From*: Andrzej Kozlowski <akoz at mimuw.edu.pl>*Date*: Mon, 16 Aug 2004 06:45:25 -0400 (EDT)*References*: <200408140550.BAA15327@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

On 14 Aug 2004, at 07:50, Edson.Brusque at smc.vnet.net wrote: > *This message was transferred with a trial version of CommuniGate(tm) > Pro* > Hello, > > I'm starting Electrical Engineering and using Mathematica for > helping me in Calculus e Algebra studies. > > I'm trying to solve this equation on Mathematica: > x + 1 - |2x - 4| + |5 - x| = 0 > > on the Math* notebook I'm typing: > Solve[x + 1 - Abs[2x - 4] + Abs[5 - x] == 0,x] > > but only got an empty output: {{}} > > Someone please can help me get Math* to solve this? > > Thank you very much, > > Edson Brusque Reduce[x + 1 - Abs[2*x - 4] + Abs[5 - x] == 0, x] x == -1 || Re[x] >= 5 && Im[x] == 0 or if you know x is real: Reduce[x + 1 - Abs[2*x - 4] + Abs[5 - x] == 0, x, Reals] x == -1 || x >= 5 Andrzej Kozlowski Chiba, Japan http://www.mimuw.edu.pl/~akoz/

**References**:**New user: Abs[] problem***From:*Edson.Brusque@smc.vnet.net