Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter R - Section R.1 - Factors and the Least Common Multiple - Exercise Set: 50

Answer

84

Work Step by Step

We can find the LCM by checking which multiple of 28 is also a multiple of 21. 28 * 1 = 28 28 * 2 = 56 28 * 3 = 84 (= 21 * 4) 84 is the first multiple of 28 and 21, so it is the LCM.
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