SOLUTION: a 24% acid solution is mixed with a 14% acid solution to form a 19% acid solution. How many liters of the 14% acid solution are used to make 20 liters of the 19% acid solution?

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Question 822443: a 24% acid solution is mixed with a 14% acid solution to form a 19% acid solution. How many liters of the 14% acid solution are used to make 20 liters of the 19% acid solution?
Found 2 solutions by josgarithmetic, Alan3354:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
tutor removed solution because solution was wrong

Replacing briefly with THIS:
u and v for the 14% and 24%;
%2814u%2B24v%29%2F20=19 and u%2Bv=20;

Solve the system for u and v.

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
a 24% acid solution is mixed with a 14% acid solution to form a 19% acid solution. How many liters of the 14% acid solution are used to make 20 liters of the 19% acid solution?
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19 is the average of 14 & 24, so it's equal amounts.