Answer
-$\frac{z}{5}$
Work Step by Step
-$\frac{7z}{15}$ +$\frac{3z}{15}$+$\frac{1z}{15}$ Add the numerators, Keep the common denominator.
=$\frac{-7z+3z+1z}{15}$ =$\frac{-3z}{15}$ =$\frac{ -3z \times1}{3\times5}$
= -$\frac{z}{5}$
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 260: 12
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