INTRODUCTORY EXERCISES

(1) Solve the following equations. 


 (a) |3x + 5| = 2

 (b) 5|x - 4| = 0.01
SOLUTION: 

 (a) |3x + 5| = 2  ==>  either 3x + 5 = 2   ==>  3x = -3  ==> x = -1
                           or  3x + 5 = -2  ==>  3x = -7  ==> x = -7/3


 (b) 5|x - 4| = 0.01  ==>  |x - 4| = 0.002  ==>  either x - 4 = 0.002   ==> x = 4.002
						    or  x - 4 = -0.002  ==> x = 3.998

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