SOLUTION: How much water must be added to dilute 10 quarts of a solution that is 18% iodine so that the resulting solution will be 15% iodine?

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Question 308861: How much water must be added to dilute 10 quarts of a solution that is 18% iodine so that the resulting solution will be 15% iodine?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How much water must be added to dilute 10 quarts of a solution that is 18% iodine so that the resulting solution will be 15% iodine?
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Equation:
iodine + iodine = iodine
0.18*10 + 0*x = 0.15(10+x)
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Multiply thru by 100 to get:
18*10 + 0 = 15*10+15x
3*10 = 15x
x = 2 quarts (amount of water needed in the mixture)
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Cheers,
Stan H.