SetDelayed::write ... [x_] is protected

*To*: mathgroup at smc.vnet.net*Subject*: [mg97863] SetDelayed::write ... [x_] is protected*From*: "Serych Jakub" <Serych at panska.cz>*Date*: Tue, 24 Mar 2009 05:30:41 -0500 (EST)

Dear M users, I have solution of equations which is dependend on one parameter lets say: sol={{i1->220/x}, {i2 -> 100+x}} and I need to define function based on this solution with the x as argument lets say: myfun[x_]:=50*220/x + 2 (100+x); I'm trying to do it like this: myfun[x_]:=50 * i1 + 2 * i2 /. sol But it prints the error message: "SetDelayed::write ... [x_] is protected". Does anybody know what's the problem and how to define such function? Thanks in advance Jakub

**Follow-Ups**:**Re: SetDelayed::write ... [x_] is protected***From:*Richard Hofler <rhofler@bus.ucf.edu>