Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
ISBN 13:

Chapter 5 - Ratio and Proportion - Review Exercises - Page 373: 30

Answer

$x=12.5$

Work Step by Step

We can set the cross products of the given proportion equal to each other and then solve for the unknown variable. $5\times20=8\times x$ $100=8x$ Divide both sides by 8. $\frac{100}{8}=\frac{8x}{8}$ $x=12.5$
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