Answer
DB=10
Work Step by Step
$\frac{DB}{AB}$=$\frac{EB}{CB}$
$\frac{DB}{DB+5}$=$\frac{8}{12}$
3DB=2DB+10
DB=10
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 5 - Section 5.3 - Proving Triangles Similar - Exercises - Page 242: 26
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