Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 4 - Section 4.2 - Solving Systems of Linear Equations by Substitution - Exercise Set - Page 302: 56

Answer

$(-8.1, -7.1)$

Work Step by Step

$x+y=-15.2$ $-2x+5y=-19.3$ $x+y=-15.2$ $y=-x-15.2$ $-2x+5y=-19.3$ $-2x+5(-x-15.2)=-19.3$ $-2x-5x-76=-19.3$ $-7x-76=-19.3$ $-7x = (76-19.3)$ $-7x = 56.7$ $-7x/-7 = 56.7/-7$ $x=-8.1$ $x+y=-15.2$ $-8.1+y=-15.2$ $y=-7.1$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.

GradeSaver will pay $15 for your literature essays
GradeSaver will pay $25 for your college application essays
GradeSaver will pay $50 for your graduate school essays – Law, Business, or Medical
GradeSaver will pay $10 for your Community Note contributions
GradeSaver will pay $500 for your Textbook Answer contributions