Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 1 - Introduction to Algebraic Expressions - 1.1 Introduction to Algebra - 1.1 Exercise Set - Page 8: 6



Work Step by Step

An algebraic expression consists of numbers and/or variables, often with operating signs and grouping symbols. An equation consists of two expressions separated by an equal sign. The equal sign tells us that the expressions on both sides of the equation have equal value. Therefore, $3x=21$ is an equation, because its components are separated by an equal sign.
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