18 Chapter 7.9, Nonhomogeneous Linear Systems. page 447

18.1 problem 1
18.2 problem 2
18.3 problem 3
18.4 problem 4
18.5 problem 5
18.6 problem 6
18.7 problem 7
18.8 problem 8
18.9 problem 9
18.10 problem 10
18.11 problem 11
18.12 problem 12
18.13 problem 13
18.14 problem 18