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 127: 21



Work Step by Step

$\frac{2}{7}=\frac{4}{d}$ cross multiply $2d=7\times4$ divide both sides by 2 $2d\div2=28\div2$ simplify $d=14$
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