Question by Ish ish: I need a little help with my algebra?
A pharmacist is to prepare 15 milliliters of special eye drops for a glaucoma patient. the eye drop solution must have 2% active ingredient, but the pharmacist only has 10% solution and 1% solution in stock. How much of each type of solution should be used to fill the prescription?

Best answer:

Answer by Merlin
0.10x + 0.01(15 - x) = 0.02(15)
0.10x + 0.15 - 0.01x = 0.3
0.09x = 0.15
x = 1.67……….10% solution
15 - x = 13.33 ………1 % solution

Proof
0.10(1.67) + 0.01(13.33) = 0.02(15)
0.167 + 0.133 = 0.300
.300 = .300

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