Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 13 - Probability - Get Ready! - Page 821: 13



Work Step by Step

We start with the given equation: $\frac{5}{7}n-12=15$ We add $12$ to both sides of the equation: $$\frac{5}{7}n-12+12=15+12$$$$\frac{5}{7}n=27$$Next, we multiply by the reciprocal of $\frac{5}{7}$, $\frac{7}{5}$, on both sides of the equation: $$\frac{7}{5}\cdot\frac{5}{7}n=27\cdot\frac{7}{5}$$$$n=37.8$$
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