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

b=4.5

#### 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 $6b\div6=27\div6$ $b=4.5$

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.