SOLUTION: How do I set up problems like these? : A 5L solution that was 12% vinegar was mixed with a 14L solution that was 69% vinegar. Find the new concentration of vinegar. I'm pretty

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Question 885798: How do I set up problems like these? :
A 5L solution that was 12% vinegar was mixed with a 14L solution that was 69% vinegar. Find the new concentration of vinegar.
I'm pretty stuck on how to set these things up. I can usually figure it out after I set it up. Thanks in advance.
Found 2 solutions by Alan3354, MathTherapy:
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
A 7L solution that was 12% vinegar was mixed with a 15L solution that was 69% vinegar. Find the new concentration of vinegar.
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7*12 + 15*69 = C*(7+15)
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Set it up like that.
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

How do I set up problems like these? :
A 5L solution that was 12% vinegar was mixed with a 14L solution that was 69% vinegar. Find the new concentration of vinegar.
I'm pretty stuck on how to set these things up. I can usually figure it out after I set it up. Thanks in advance.


Let new concentration be P

Therefore, 

Solve for P to get the percentage of vinegar in new concentration.

**Hint: You should get a new concentration of .54, or 54%

If you need a complete and detailed solution, let me know!!



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