Answer
20/7
Work Step by Step
Let x be the amount of antifreeze that has to be replaced.
$\frac{0.3(10-x)+x}{10}=0.5$
0.3(10-x)+x = 0.5
0.7x + 3 = 5
0.7x = 2
x = 20/7
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 1 - Review Exercises - Page 153: 45
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