Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 8 - Systems of Linear Equations and Problem Solving - 8.3 Solving Applications: Systems of Two Equations - 8.3 Exercise Set - Page 527: 9

Answer

61 and 119

Work Step by Step

We first write the word problem as an equation. Next, we solve the equation using substitution. Doing this, we find: $$ x+y=180 , y=2x-3 \\ x+2x-3=180 \\ x=61 \\ y=2\cdot \:61-3 \\ y=119$$
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