SOLUTION: How many ounces of a 4% acid solution and how many ounces of a 10%acid solution must be mixed to make 24 oz of a 6% acid solution?

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Question 1121518: How many ounces of a 4% acid solution and how many ounces of a 10%acid solution must be mixed to make 24 oz of a 6% acid solution?
Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
Notice, 4, 5, 6, 7, 8, 9, 10
The asked-for 6% is 2%2F3 of the way from 4 to 10.
24%2F3=8;

16 ounces of the 4% and 8 ounces of the 10%.


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x, amount ounces of 4%
80-x, amount of 10%
4x%2B10%2824-x%29=24%2A6
-
2x%2B5%2824-x%29=24%2A3
2x%2B120-5x=72
-3x=72-120
3x=120-72
x=40-24
x=16