Algebra: A Combined Approach (4th Edition)

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

Chapter 4 - Section 4.4 - Systems of Linear Equations and Problem Solving - Exercise Set - Page 321: 38

Answer

126 degrees and 54 degrees

Work Step by Step

$x+y=180$ $x=2y+18$ $x+y=180$ $2y+18+y=180$ $3y=162$ $3y/3=162/3$ $y=54$ $x=2y+18$ $x=2*54+18$ $x=108+18$ $x=126$
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