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

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) (Show Source): You can put this solution on YOUR website!
Do it like this one. Only the numbers are different.
-----------
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?
================
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
RELATED QUESTIONS
I Need help with this word problem....can anyone help...thank you. Mixing Alcohol... (answered by Nate)

A pharmacist has a 10% alcohol solution and a 25% alcohol solution. How many milliliters... (answered by Alan3354)

How many liters of a 40%-alcohol solution must be mixed with 10 liters of a solution that (answered by Fombitz)

I need to translate this problem into a pair of linear equations in two variables. How... (answered by nyc_function)

I need help with mixturee numbers. Here is an ex: A pharmacist has 20 grams of a 10%... (answered by Theo,ewatrrr)

Hello guys, I need help here :( I'm confused by the wording used for this problem: "A... (answered by macston)

Could you please help me with this problem. I am supposed to use a system of equations to (answered by ankor@dixie-net.com)

Please help me solve this word problem: A pharmacist needs to strengthen a 15% alcohol... (answered by stanbon)

a pharmacist has 10% and 30% alcohol solutions instock. to prepare 200mL of 25% solution... (answered by josmiceli)