SOLUTION: A 10% salt solution is mixed with an 18% salt solution to obtain a 32 oz 15% solution. How many ounces of each are needed?

Question 279858: A 10% salt solution is mixed with an 18% salt solution to obtain a 32 oz 15% solution. How many ounces of each are needed?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = ounces of 10% solution needed
Let = ounces of 18% solution needed
given:
(1) ounces
(2)
(2)
-------------------
Multiply both sides of (2) by
(2)
Multiply both sides of (1) by
and subtract from (2)
(2)
(1)

and, since

12 ounces of 10% solution and 20 ounces of 18% solution are needed
check:
(2)

OK
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