Algebra: A Combined Approach (4th Edition)

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

Chapter 4 - Section 4.3 - Solving Systems of Linear Equations by Addition - Practice: 1

Answer

(9, 4)

Work Step by Step

Add the equations: x + y = 13 x - y = 5 2x = 18 Solve for x: x = 9 Let x = 9 in one of the equations to find y: 9 + y = 13 y = 4 Check in second equation: 9 - 4 = 5 5 = 5; True The solution is (9, 4)
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