Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 1, Equations and Inequalities - 1.1 Apply Properties of Real Numbers - 1.1 Exercises - Skill Practice - Page 7: 51



Work Step by Step

We simplify the expression to obtain: $$(a-b)-c=a-(b-c) \\ a-b-c = a-b+c \\ -c =c$$ This statement is true when the value of c is 0. Thus, we conclude that the given statement is sometimes true.
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