Answer
x=6
Work Step by Step
m$\angle$1=m$\angle$4
x$^{2}$-12=x(x-2)
-12=-2x
x=6
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 - Review Exercises - Page 123: 16
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