Prealgebra (7th Edition)

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

Chapter 7 - Cumulative Review: 17



Work Step by Step

-$\frac{3}{4}$ - $\frac{1}{14}$ +$\frac{6}{7}$= LCD (4,14,7) is 392 -$\frac{3}{4}$$\times$ $\frac{98}{98}$ - $\frac{1}{14}$$\times$ $\frac{28}{28}$ + $\frac{6}{7}$$\times$$\frac{56}{56}$= =-$\frac{294}{392}$ - $\frac{28}{392}$ +$\frac{336}{392}$= =$\frac{-294 - 28 + 336}{392}$ =$\frac{14}{392}$=$\frac{14}{14\times28}$=$\frac{1}{28}$
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