Answer
x=20
Work Step by Step
Angles 4 and 5 are alternate interior angles so they are congruent.
m$\angle$4=m$\angle$5
5x=4(x+5)
5x=4x+20
x=20
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Cengage
ISBN 10:
978-1-337-61408-5
ISBN 13:
978-1-33761-408-5
Chapter 2 - Section 2.3 - Proving Lines Parallel - Exercises - Page 101: 23
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