#### 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.

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

You need 5 gallons of water.

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