SOLUTION: In Chemistry, you mixed a 10% solution with a 15% solution to get 100 milliliters of a 12% solution. How much of the 10% solution did you you use in the mixture?

Question 821183: In Chemistry, you mixed a 10% solution with a 15% solution to get 100 milliliters of a 12% solution. How much of the 10% solution did you you use in the mixture?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
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10x + 15y = 12*100
x + y = 100
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10x + 15y = 1200
x + y = 100
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x= 60 ml of 10%
y= 40 ml of 15%
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answer:
60 ml of 10%
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