SOLUTION: How many milliliters of water must be added to 60 mL of a 15% iodine solution in order to dilute it to a 10% iodine solutioN?

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Question 390739: How many milliliters of water must be added to 60 mL of a 15% iodine solution in order to dilute it to a 10% iodine solutioN?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
60*0.15 + x*0.00 = (60 + x)*0.10;
9 = 6 + 0.10x;
3 = 0.10x;
x = 30 mL of water must be added.