13.7 Section 2.2, linear equations with constant coefficients. Page 138

13.7.1 problem 1
13.7.2 problem 2
13.7.3 problem 3
13.7.4 problem 4
13.7.5 problem 5
13.7.6 problem 6
13.7.7 problem 7
13.7.8 problem 8
13.7.9 problem 9
13.7.10 problem 10
13.7.11 problem 11
13.7.12 problem 12