Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 2 - Solving Equations - 2-7 Solving Proportions - Practice and Problem-Solving Exercises - Page 128: 45



Work Step by Step

Use the multiplication property since the variable is in the numerator. $\frac{r}{2.1}=\frac{3.6}{2.8}$ multiply both sides by 2.1 $\frac{r}{2.1}\times2.1=\frac{3.6}{2.8}\times2.1$ simplify $r=\frac{7.56}{2.8}$ reduce $r=2.7$
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