Prealgebra (7th Edition)

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

Chapter 4 - Section 4.5 - Adding and Subtracting Unlike Fractions - Exercise Set: 43



Work Step by Step

LCD is 42. $-\frac{5}{6}-\frac{3}{7}=-\frac{5\times7}{6\times7}-\frac{3\times6}{7\times6}=-\frac{35}{42}-\frac{18}{42}=\frac{-35-18}{42}=\frac{-53}{42}$
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