SOLUTION: How many liters of a 70% acid solution must be added to 12 liters of a 20% acid solution to produce a 40% acid solution?

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Question 1094297: How many liters of a 70% acid solution must be added to 12 liters of a 20% acid solution to produce a 40% acid solution?
Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Been done 1000's of times.
Look it up.

Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
.
There is entire bunch of introductory 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
in this site.

For example,  Problem 2 of the lesson (*) is your sample/prototype.

Read them and become an expert in solution 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 textbook in the section "Word problems" under the topic "Mixture problems".


Save the link to this online textbook together with its description

Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson

to your archive and use it when it is needed.