Answer
$x=8$
Work Step by Step
$m\angle 1=m\angle 3+m\angle5$
$8(x+2)=5x-3+5(x+1)-2$
$8x+16=5x-3+5x+5-2$
$2x=16$
$x=8$
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 2 - Section 2.4 - The Angles of a Triangle - Exercises - Page 97: 28
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