Re: Equation problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg109164] Re: Equation problem*From*: DC <b.gatessucks at gmail.com>*Date*: Wed, 14 Apr 2010 23:12:52 -0400 (EDT)*References*: <hq39ug$na6$1@smc.vnet.net>

If I understand your equation correctly then x is not a linear function of y : In[2]:= Solve[y == (1 + Sqrt[a/x]) x/b, x] Out[2]= {{x -> 1/2 (a + 2 b y - Sqrt[a] Sqrt[a + 4 b y])}, {x -> 1/2 (a + 2 b y + Sqrt[a] Sqrt[a + 4 b y])}} -Francesco On 04/14/2010 03:40 AM, Asttro wrote: > I just started using Mathematica and have no idea how to do the following... > > I have the starting equation: > > y=((1+sqrt(5.71e8/x))*x)/6.38e9 > > What I want is to obtain x=a+b*y, where a and b are parameters. > > Is this possible in Mathematica? >