SOLUTION: A saline solution is 20% salt. How many gallons of water must be added to dilute the mixture to 8 gals of a 15% saline solution?

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Hi,

Let x represent the amount of water

.20(8-x)= .15*8gal

.05*8 = .20x

2 = x

2 gallons of water need to be added

Check your answer

.20*6 = 1.2 = .15*8