Here are the steps we need to carry out, starting with the augmented matrix:

0.1
0.1
0
0.4
0 10 R1
2
0
1/2
0
22 R2
0
1
-1
1
1/22 R3
0
0
1
2
1
1
1
0
4
0
4
0
1
0
4R2-4 R1
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


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