Prealgebra (7th Edition)

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

Chapter 4 - Section 4.6 - Complex Fractions and Review of Order of Operations - Exercise Set: 82

Answer

$2\frac{3}{7}$

Work Step by Step

When $x=\frac{3}{4}$ and $y=-\frac{4}{7}$: $4x+y$ $=4(\frac{3}{4})+(-\frac{4}{7})$ $=(\frac{4}{1}\times\frac{3}{4})-\frac{4}{7}$ $=(\frac{1}{1}\times\frac{3}{1})-\frac{4}{7}$ $=\frac{3}{1}-\frac{4}{7}$ $=\frac{21}{7}-\frac{4}{7}$ $=\frac{17}{7}$ $=2\frac{3}{7}$
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