SOLUTION: How many Liters of a 50% alcohol solution must be mixed with 40 Liters to obtain a 60 Liter solution?

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Question 49580: How many Liters of a 50% alcohol solution must be mixed with 40 Liters to obtain a 60 Liter solution?
Answer by ptaylor(1894) About Me  (Show Source):
You can put this solution on YOUR website!
This problem seems to have some missing parts. The wording from the source document needs to be re-checked. As stated, the solution is trivial.
let x=amt of 50% solution to be added
Then x+40=60; x=20 liters
Hope this helps----ptaylor