Elementary Algebra

by Kaufmann, Jerome; Schwitters, Karen;

Published by Cengage Learning

ISBN 10: 1285194055

ISBN 13: 978-1-28519-405-9

Chapter 5 - Exponents and Polynomials - 5.1 - Addition and Subtraction of Polynomials - Problem Set 5.1 - Page 195: 22

Answer

$-1$

Work Step by Step

We write an expression to express this addition problem: $(-x-4)+(8x+9)+(-7x-6)$ We use the commutative and associative properties of addition to group like terms: $(-x+8x+(-7x))+(-4+9+(-6))$ We combine the like terms: $0x+(-1)=-1$

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