Re: How to use the result of Solve in Plot?

*To*: mathgroup at smc.vnet.net*Subject*: [mg111667] Re: How to use the result of Solve in Plot?*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Mon, 9 Aug 2010 05:15:40 -0400 (EDT)

This works; however, the Solve is evaluated repeatedly n = 0; Plot[y /. Solve[{n++; 5*x + 4*y == 12}, y], {x, 0, 2}] n 78 Adding Evaluate results in a single evaluation of the Solve n = 0; Plot[Evaluate[y /. Solve[{n++; 5*x + 4*y == 12}, y]], {x, 0, 2}] n 1 So use Plot[Evaluate[y /. Solve[5*x + 4*y == 12, y]], {x, 0, 2}] Bob Hanlon ---- "Eduardo M. A. M.Mendes" <emammendes at gmail.com> wrote: ============= Hello I want to use the result of Solve[{5*x+4*y==12},{y}] in Plot[.,{x,0,2}]. Plot[Solve[.],{x,0,2}] does not work. Many thanks Ed PS. I am new to Mathematica.