83.5 Chapter III. First order differential equations of the first degree. Ex. VI at page 47

83.5.1 problem 1 (a)
83.5.2 problem 1 (b)
83.5.3 problem 1 (c)
83.5.4 problem 1 (d)
83.5.5 problem 1 (e)
83.5.6 problem 2 (a)
83.5.7 problem 2 (b)
83.5.8 problem 2 (c)