SOLUTION: how many quarts of a solution with 18% iodine must be added to 40 quarts of water to have a resulting solution with 10% iodine? Can somebody please explain me in details without

Question 308870: how many quarts of a solution with 18% iodine must be added to 40 quarts of water to have a resulting solution with 10% iodine? Can somebody please explain me in details without any Shortcuts:/
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
how many quarts of a solution with 18% iodine must be added to 40 quarts of water to have a resulting solution with 10% iodine? Can somebody please explain me in details without any Shortcuts:/
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Equation:
iodine + iodine = iodine
0.18x + 0*40 = 0.10(x+40)
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Multiply thru by 100 to get:
18x + 0 = 10x + 10*40
8x = 10*40
x = 10*5
x = 50 quarts (amt. of 18% solution needed in the mixture)
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Cheers,
Stan H.
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