Answer
$6.7$ pounds
Work Step by Step
Let $x$ be the number of pounds of cashews needed to add.
$3 \times 20 + 5 \times x = 3.50 \times (20+x)$
$60+5x=70+3.5x$
$1.5x=10$
$x\approx6.7$ pounds
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 2 - Section 2.6 - Percent and Mixture Problem Solving - Exercise Set - Page 160: 26
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