Elementary Algebra

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

Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.3 - Integers: Addition and Subtraction - Problem Set 1.3: 99

Answer

$= -17$

Work Step by Step

1. We first substitute the $x, y, and \space z$ values into the equation using parenthesis: $x - y - z$ for $x = -15$, $ y = 12$, $z = -10$ $= (-15) - (12) - (-10)$ 2. 2. A double negative such as "−(−10)" will cancel out to become "10", a positive number. $= - 15 - 12 + 10$ $= -27 + 10$ $= -17$
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