Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 4 - Section 4.2 - Solving Systems of Linear Equations by the Substitution Method - Exercise Set: 1

Answer

{(1,3)}

Work Step by Step

y=3x Plug this value of y into the other equation. x+y=4 x+(3x)=4 4x=4 x=$\frac{4}{4}$ x=1 Now plug this back into the first equation to find y. y=3(1) y=3 Therefore the solution set is {(1,3)}
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.