Answer
$n=30$
Work Step by Step
$\dfrac{n}{10}=9-\dfrac{n}{5}$
Multiply the whole equation by $10$:
$10\Big(\dfrac{n}{10}=9-\dfrac{n}{5}\Big)$
$n=90-2n$
Solve for $n$:
$n+2n=90$
$3n=90$
$n=\dfrac{90}{3}$
$n=30$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 7 - Review - Page 558: 41
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