49.7 Chapter 2. Linear equations with constant coefficients. Page 74

49.7.1 problem 4(a)
49.7.2 problem 4(b)
49.7.3 problem 4(c)
49.7.4 problem 4(d)
49.7.5 problem 4(f)
49.7.6 problem 4(g)
49.7.7 problem 4(h)
49.7.8 problem 4(i)