You can use equations and formulas to model a variety of real-world problems. Business and industry, science, sports, travel, architecture, banking—these are some of the areas that rely on equations and inequalities to find solutions to problems, often by making comparisons and analyzing results.

In this chapter you will: build on your knowledge of algebraic concepts and simple equations learned in Chapter 3 learn to solve simple equations and inequalities that involve proportions learn to solve simple equations and inequalities that involve variables on both sides learn to solve simple equations and inequalities that involve absolute values learn to solve simple equations and inequalities that involve formulas