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