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: 15

Answer

$\frac{-44}{7}$

Work Step by Step

LCD is 7. $-7+\frac{5}{7}=\frac{-7}{1}+\frac{5}{7}=\frac{-7\times7}{1\times7}+\frac{5}{7}=\frac{-49}{7}+\frac{5}{7}=\frac{-49+5}{7}=\frac{-44}{7}$
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