Answer
-$\frac{3}{z}$
Work Step by Step
$\frac{4}{z}$ -$\frac{7}{z}$=$\frac{4-7}{z}$ =$\frac{-3}{z}$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 4 - Section 4.8 - Solving Equations Containing Fractions - Exercise Set - Page 311: 18
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