Use the Gauss-Jordan method to invert

Question

1 0 0 2 -1 0 0 0 1
A1= 1 1 1 A2= -1 2 -1 A3= 0 1 1
0 0 1 0 -1 2 1 1 1

can someone help me to invert those matrix using Gauss-Jordan method