SOLUTION: An 18% iodine solution is mixed with with a 45% iodine solution to make 12 ounces of a 36% iodine solution. How many ounces of each were used?

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Question 697691: An 18% iodine solution is mixed with with a 45% iodine solution to make 12 ounces of a 36% iodine solution. How many ounces of each were used?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Do it like this one:
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Pamela has a solution of 50% acid and another of 80% acid. How many ounces of each will make 300 ounces of a solution that is 72% acid?
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f = 50%
e = 80%
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e + f = 300 (total solution)
80e + 50f = 72*300 (total acid)
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Solve for e & f