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