Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 6 - Section 6.2 - Proportions - Exercise Set: 68

Answer

30$\frac{6}{7}$ $\approx$ 30.86

Work Step by Step

$\frac{x}{12}$=$\frac{18}{7}$ set cross product equal 7x=12$\times$18 multiply 7x= 216 divide by 7 both sides $\frac{7x}{7}$=$\frac{216}{7}$ x=$\frac{216}{7}$ x=30$\frac{6}{7}$ x$\approx$ 30.86 Check $\frac{x}{12}$=$\frac{18}{7}$ set cross product equal $\frac{\frac{216}{7}}{12}$=$\frac{18}{7}$ set cross product equal 7$\frac{216}{7}$=12$\times$18 multiply 216=216 true The solution is 30$\frac{6}{7}$ $\approx$30.86
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