Answer
$20$
Work Step by Step
Written horizontally, this problem reads $13-(-7)$
Subtracting a negative number is the same thing as adding a positive number. We rewrite the expression as $13+7$
We perform the addition to get $20$
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: 82
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