SOLUTION: forty liters of a 60% salt soltution are reduced to a 45% SOLUTION. hOw much must be drained off and replaced with distilled water so that the resulting solution will contain only

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Question 393687: forty liters of a 60% salt soltution are reduced to a 45% SOLUTION. hOw much must be drained off and replaced with distilled water so that the resulting solution will contain only 45% salt?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
forty liters of a 60% salt soltution are reduced to a 45% SOLUTION. hOw much must be drained off and replaced with distilled water so that the resulting solution will contain only 45% salt?
.
Let x = amount (liters) replaced with distilled water
then
.60(40-x) = .45(40)
24-.60x = 18
-.60x = -6
x = (-6)/(-0.60)
x = 10 liters