Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 3 - Section 3.1 - Systems of Linear Equations in Two Variables - Exercise Set - Page 191: 82



Work Step by Step

To solve the given problem we will have to plug the simplest equation into the other equation and then solve for the other variable. $4y=-5x $ or $y=\dfrac{-5x}{4}$ Now, $5x+8y=20$ or, $5x+8(\dfrac{-5x}{4})=20$ or, $20=-5x$ or, $x=-4$ and $y=\dfrac{-5x}{4}=5$ Hence, the desired result is $(-4,5)$
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.