Answer
$t=12$
Work Step by Step
$d= r*t$
$d=20x/3$
$r=5x/9$
$20x/3 =5x/9*t$
$20x/3*9=5x/9*t*9$
$180x/3 = 5x*t$
$60x =5x*t$
$60x/x=5xt/x$
$60=5t$
$60/5=5t/5$
$12=t$
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 - Section 7.7 - Simplifying Complex Fractions - Exercise Set - Page 550: 55
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