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: 96

Answer

$=1 $

Work Step by Step

1. We first substitute the $x, y, and \space z$ values into the equation using parenthesis: $-x-y+z$ for $x = -8$, $y = -7$, $z = -14$ $= -(-8) - (-7) + (-14)$ 2. A double negative such as "$-(-8)$" will cancel out to become "$8$", a positive number. A positive and a negative number like "$+(-14)$" will become "$-14$", a negative number : $= 8 + 7 - 14$ $= 15 - 14$ $= 1$
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