Answer
$x=6$
Work Step by Step
We have $\frac{15}{x} = \frac{390}{156}$
Then $x = \frac{15*156}{390} = 6$
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapters 1-10 - Cumulative Review Exercises - Page 757: 18
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