SOLUTION: A scientist has two solutions, which she has labeled Solution A and Solution B. Each contains salt. She knows that Solution A is 60% salt and Solution B 85% is salt. She wants to

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Question 368755: A scientist has two solutions, which she has labeled Solution A and Solution B. Each contains salt. She knows that Solution A is 60% salt and Solution B 85% is salt. She wants to obtain 60 ounces of a mixture that is 70% salt. How many ounces of each solution should she use?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
Let a = #oz. of solution A
Then 60-a = # oz. solution B. Then
0.60a +0.85(60-a) = 0.70*60,
0.60a + 51 - 0.85a = 42,
-0.25a = -9,
a = 36 oz. of solution A, and 24 oz. of solution B.