Elementary Algebra

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

Chapter 3 - Equations and Problem Solving - 3.2 - Equations and Problem Solving - Problem Set 3.2: 57

Answer

The number is 5

Work Step by Step

Let X represent the number we need to find: Three times a certain number means 3X. 4 larger than three times a certain number means 4 + 3X. So: 19 = 4 + 3X Subtract 4 from both sides 15 = 3X Divide both sides by 3 5 = X
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