Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 1 - Tools of Geometry - Common Core Cumulative Standards Review - Selected Response - Page 78: 16



Work Step by Step

Since Y is the midpoint, $XY\cong YZ$. $2b-1=26-4b$ add 4b to each side $2b-1+4b=26-4b+4b$ $6b-1=26$ add 1 to each side $6b-1+1=26+1$ $6b=27$ divide each side by 6 $6b\div6=27\div6$ $b=4.5$
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