Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 2 - Solving Equations - 2-7 Solving Proportions - Lesson Check - Page 127: 9



Work Step by Step

Lisa's first step was cross multiplying, which cancels out the fractions. Jen also cancels out the fractions, but he multiplies both sides by 20 to cancel out the denominators. Both ways are valid, and because they both cancel out the fractions, both ways are certainly valid ways to solve the problem.
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.