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 - 1.4 - Integers: Multiplication and Division - Problem Set 1.4 - Page 26: 71



Work Step by Step

We first follow the instructions to plug in 7 for x and -7 for y. Because multiplication is before subtraction and addition in order of operations, once within the parenthesis, we first multiply, and then we add and subtract. $-2(7)+6(-7)-(7)(-7)=-14-42+49=-7$
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