5 Chapter 2. Linear homogeneous equations. Section 2.3.4 problems. page 104

5.1 problem 1
5.2 problem 2
5.3 problem 3
5.4 problem 4
5.5 problem 5
5.6 problem 6
5.7 problem 7
5.8 problem 8
5.9 problem 9
5.10 problem 10
5.11 problem 11
5.12 problem 12