SOLUTION: Two liters of 40% acid are mixed with 4 liters of another acid to form a 50% acid solution. What is the strength of the added acid?

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Question 249695: Two liters of 40% acid are mixed with 4 liters of another acid to form a 50% acid solution. What is the strength of the added acid?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
If I have 3 liters 25% acid and 5 liters of another acid and want 60% solution what do I do?
5+3 liters = 8 liters total
.25(3)+5x=8(.60)
solve for x
Do the same (different numbers of course) for your problem