# Linear Algebra: Theory and Applications
# Ward Cheney & David Kincaid
# JBPub.com (c) 2008 
# File: exp128.map
# Example 1.2.8

with(LinearAlgebra):
A := Matrix([[1,2,3,20],[4,5,6,47],[7,8,9,74],[10,11,12,101]]);
ReducedRowEchelonForm(A);