Homework Help: Math

Posted by Vinnnie on Wednesday, February 10, 2010 at 11:02am.

A druggist mixes a 10% solution of iodine with a 15% solution of iodine. How much of each solution should be used in order to obtain 20 cubic centimeters of a 12% solution?

Math - drwls, Wednesday, February 10, 2010 at 11:12am
Another algebra problem in two variables. Why are you changing names?

Please show your work for further assistance.
Math - Vinnie, Wednesday, February 10, 2010 at 11:20am
I'm not changing names. This is the only one that I posted today. Because this is the only one out of my homework that I don't understand how to do.
Math - drwls, Wednesday, February 10, 2010 at 3:25pm
Let X = cc of 10% iodine solution
Let Y = cc of 15% iodine solution

X + Y = 20
(0.1X + 0.15 Y) = 0.12*20

X + 1.5 Y = 24
0.5Y = 4

Take it from there.
Math - Vinnie, Wednesday, February 10, 2010 at 3:51pm
Thanx :)

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