Algebra Demystified 2nd Ed

45

chapter

2

Introduction to

Variables

Variables lie at the heart of courses from algebra to calculus and beyond. In this

introduction, we will learn how to perform arithmetic on fractions containing

one or more variables, and we will learn how to use variables to represent quan-

tities in word problems. In later chapters, we will learn how to work with vari-

ables so that we can rewrite expressions. These skills are useful for solving

equations and applied problems.

CHAPTER OBJECTIVES

In this chapter, you will

• Simplify fractions containing variables


• Perform arithmetic on fractions containing variables


• Rewrite a fraction as a product of a number and a variable expression


• Use variables to represent quantities in applied problems