Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 6 - Algebra: Equations and Inequalities - 6.1 Algebraic Expressions and Formulas - Exercise Set 6.1: 87

Answer

False. New statement: -x -(x)=-x+x = 0

Work Step by Step

-x-x=-2x $\ne$ 0 The terms do not cancel out. Thus the statement is false New statement: -x -(x)=-x+x = 0 By adding another negative sign to one of the negative terms, -x is multiplied by -1 to form +x. -x+x will add to form 0.
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