SOLUTION: Sally wants to make a 36% acid solution. She has already poured 3 fluid ounces of a 72% acid solution in a beaker. How many fluid ounces of a 9% acid solution must she pour in to c

SOLUTION: Sally wants to make a 36% acid solution. She has already poured 3 fluid ounces of a 72% acid solution in a beaker. How many fluid ounces of a 9% acid solution must she pour in to c

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Question 391562: Sally wants to make a 36% acid solution. She has already poured 3 fluid ounces of a 72% acid solution in a beaker. How many fluid ounces of a 9% acid solution must she pour in to create the desired mixture?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
0.72*3 + 0.09x = 0.36(3 + x)
==> 2.16 + 0.09x = 1.08 + 0.36x
==>1.08 = 0.27x
x = 4 fluid ounces 9% acid solution.
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