Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 1 - Introduction to Algebraic Expressions - 1.6 Subtraction of Real Numbers - 1.6 Exercise Set: 100

Answer

$-22$

Work Step by Step

The expression $a-(-b)$ simplifies to $a+b.$ The expression $a+(-b)$ simplifies to $a-b.$ Hence, the given expression, $ 22-(-18)+7+(-42)-27 ,$ simplifies to \begin{array}{l}\require{cancel} 22-(-18)+7+(-42)-27 \\\\= 22+18+7-42-27 \\\\= 40+7-42-27 \\\\= 47-42-27 \\\\= 5-27 \\\\= -22 .\end{array}
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