Applied mathematics is seen often to involve the solution of single equations or systems of equations. A particular technique for solving equations in the context of functions on the real line is examined. This technique includes an iterative process, which is viewed as an algorithm that can be implemented readily on inexpensive and widely available calculators. Some examples of physical problems in which the equations of interest arise are presented. This module includes exercises and a model exam. Answers to problems in the exercises and on the test are provided in the material. (MP)