SOLUTION: how many ounces of 5% alchol solution and how many ounces of a 15% alchol solution must be mixed to get 40 ounces of a 9% alchol solution?

Question 368550: how many ounces of 5% alchol solution and how many ounces of a 15% alchol solution must be mixed to get 40 ounces of a 9% alchol solution?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Let A be the number of ounces of 5% alchol solution, B the ounces of a 15% alchol solution.
.
.
.
Total volume:
1.
Total concentration:

2.
Subtract eq. 1 from eq. 2,

ounces
From eq. 1,

ounces
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