Answer
X=5
Work Step by Step
We see that AB+BC=AC. Thus, we find:
$$ x+x+7=4x-3 \\ 2x+7=4x-3 \\ 10=2x \\ x=5$$
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 P - Preliminary Concepts - Chapter P Review Exercises - Page 29: 39
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