Answer
The number is $20$.
Work Step by Step
Let $x =$ the number
$\frac{1}{2}x + 2x = 50$
$\frac{x}{2} + 2x = 50$
$x + (2x \times 2) = (50 \times 2)$
$x + 4x = 100$
$5x = 100$
$x = \frac{100}{5}$
$x = 20$
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
Chapter 9 - Basic Algebra - 9.8 Using Equations to Solve Application Problems - 9.8 Exercises - Page 687: 33
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