SOLUTION: I need help making this word problem into two equations. A pharmacist has a 10% alcohol solution and a 25% alcohol solution. How many millimeters of each solution will she need to

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Question 945841: I need help making this word problem into two equations.
A pharmacist has a 10% alcohol solution and a 25% alcohol solution. How many millimeters of each solution will she need together in order to have 200 milliliters of a 20% alcohol solution?
I know that I need to use the elimination method in order to solve this but that is all I know.
Please help me.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Do it like this one. Only the numbers are different.
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Amanda wants to make 8 gal. of a 20% saline solution by mixing together a 56% saline solution and a 8% saline solution. How much of each solution must she use?
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e = amount of 8%
f = amount of 56%
---
e+ f = 8 (total solution)
8e + 56f = 20*8 (total saline)
---
e+ f = 8
e + 7f = 20
------------ Subtract
-6f = -12
f = 2
e = 6