Equation problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg109124] Equation problem*From*: Asttro <imoric1 at gmail.com>*Date*: Mon, 19 Apr 2010 04:07:26 -0400 (EDT)

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?