Here are the steps we need to carry out, starting with the augmented matrix:
0.1
0.1
0
0.4
0
10 R
1
2
0
1/2
0
2
2 R
2
0
1
1
1
1/2
2 R
3
0
0
1
2
1
1
1
0
4
0
4
0
1
0
4
R
2
4 R
1
0
2
2
2
1
0
0
1
2
1
1
1
0
4
0
0
4
1
16
4
0
2
2
2
1
0
0
1
2
1
1
4 R12
4162