# math

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a pharmacist mixed some 10% saline solution with some 15% saline solution to obtain 100ml of a 12%saline solution.How much of 10% saline solution did the pharmist use in the mixture.dO NOT UNDERSTAND TO MUCH INFO.

• math -

.024 divided by .235

• math -

how did you get that

• math -

let the amount of 10% solution be x ml
then the amount of 15% solution must be 100-x ml

.10x + .15(100-x) = .12(100)
10x + 15(100-x) = 12(100)
10x + 1500 - 15x = 1200
-5x = -300
x = 60

• math -

31.25 liters

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