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 161: 48

Answer

You need 5 gallons of water.

Work Step by Step

Water is 0% antifreeze. $0*x+.7*30=0.6*(x+30)$ $21=0.6x+18$ $3=0.6x$ $x=5$ You need 5 gallons of water.

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