(*						      *)
(* Numerical Mathematics and Computing, Fifth Edition *)
(* Ward Cheney & David Kincaid		              *)
(* Brooks/Cole Publ. Co.			      *)
(* (c) 2003                                           *)
(* No warranties implied or expressed.	              *)
(* File: lin_sys2				      *)

(* linear system example 2 *)
A = {{3,-13,9,3}, {-6,4,1,-18},
     {6,-2,2,4}, {12,-8,6,10}}
b = {-19,-34,16,26}
x = LinearSolve[A, b]