Answer
$= -340$
Work Step by Step
Recall the following rule:
$-a+(-b)=-a-b$
Thus, we obtain:
$= -120 + (-220)$
$= -120 - 220$
$= -340$
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
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 - Page 20: 114
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