Answer
10
Work Step by Step
$\frac{7}{x} = \frac{10\frac{1}{2}}{15}$
$105 = 10.5x$
$x = 10$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 6 - Section 6.5 - Congruent and Similar Triangles - Exercise Set - Page 453: 27
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