Geometry: Common Core (15th Edition)

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

Chapter 7 - Similarity - Chapter Review - Page 481: 9


$x = 6$

Work Step by Step

$\frac{x}{3} = \frac{x + 4}{5}$ The cross products property states that the product of the means is the product of the extremes. Get rid of the fractions by using the cross products property to multiply the numerator of one fraction with the denominator of the other fraction, and vice versa: $5x = 3(x + 4)$ Use the distributive property first: $5x = 3x + 12$ Subtract $3x$ from each side of the equation to move variables to the left side of the equation: $2x = 12$ Divide each side by $2$ to solve for $x$: $x = 6$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.