Answer
-$\frac{2}{3}$
Work Step by Step
$\frac{9}{12}$ - $\frac{7}{12}$-$\frac{10}{12}$
= $\frac{9-7-10}{12}$
=$\frac{-8}{12}$
=-$\frac{4\times 2}{4\times3}$
= -$\frac{2}{3}$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 4 - Section 4.4 - Adding and Subtracting Like Fractions, Least Common Denominator, and Equivalent Fractions - Exercise Set - Page 261: 33
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