SOLUTION: A hospital needs to dilute a 60% boric solution to a 10% solution. If it needs 40 liters of the 10% solution, how much of the 60% solution and how much water should it use?

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Question 337049: A hospital needs to dilute a 60% boric solution to a 10% solution. If it needs 40 liters of the 10% solution, how much of the 60% solution and how much water should it use?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let A be the amount of 60% solution and B the amount of 0% solution (pure water).
1.A%2BB=40
.
.
.
60%2AA%2B0%2AB=10%2840%29
2.60A=400
A=400%2F60
highlight%28A=20%2F3%29
Then from eq. 1,
20%2F3%2BB=40
B=120%2F3-20%2F3
highlight%28B=100%2F3%29