SOLUTION: How many liters of a 12% ethanol solution must be mixed with 15 liters of a 27% ethanol solution to obtain a 24% ethanol solution?

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Question 1088996: How many liters of a 12% ethanol solution must be mixed with 15 liters of a 27% ethanol solution to obtain a 24% ethanol solution?
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
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0.12x + 0.27*15 = 0.24*(x+15)  ====>

0.12x + 0.27*15 = 0.24x + 0.24*15  ====>  

0.12x - 0.24x = 0.24*15 - 0.27*15  ====>

-0.12x = -0.03*15  ====>


x = %28-0.03%2A15%29%2F%28-0.12%29 = 3.75.


Answer.  3.75 liters of the 12% solution must be mixed with 15 liters of the 27% solution to get 0.24% solution.


One of standard problems on mixtures.

There is entire bunch of lessons covering various types of mixture problems
    - Mixture problems
    - More Mixture problems
    - Solving typical word problems on mixtures for solutions
    - Word problems on mixtures for antifreeze solutions
    - Word problems on mixtures for alloys
    - Typical word problems on mixtures from the archive
    - Advanced mixture problem for three alloys
    - OVERVIEW of lessons on word problems for mixtures
in this site.

Read them and become an expert in solution the mixture word problems.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Mixture problems