Algebra: A Combined Approach (4th Edition)

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

Chapter 9 - Section 9.1 - Solving Systems of Linear Equations in Three Variables and Problem Solving - Exercise Set - Page 638: 30

Answer

$x=5, y=7$

Work Step by Step

Let's focus on Step 2: translate. The first equation means, $$3x-y = 8$$ The second equation means, $$x+y=12$$ Adding the equations, $$4x=20$$ $$x=5$$ Thus $y=7$ since the sum must be 12.
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.