Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 3 - Equations and Problem Solving - Chapter 3 Review Problem Set - Page 137: 35

Answer

The other number is 33.

Work Step by Step

Let X represent the biggest number. Since their difference is 21, the smallest number is X - 21. We know that the smallest number is 12, so we can set up the following equation: X - 21 = 12 X = 12 + 21 X = 33
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