SOLUTION: Mixture A is 7.5% acid. To raise the concentration of acid to 10%, some pure acid will be added to the mixture. How many liters of mixture A and how many liters of pure acid are

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Question 886153: Mixture A is 7.5% acid. To raise the concentration of acid to 10%, some pure acid
will be added to the mixture. How many liters of mixture A and how many liters of
pure acid are needed to end up with 200 liters of 10% solution?

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
This can be done only for percents as volume per volume.

u=how much 7.5%, v = how much pure 100%.

%287.5u%2B100v%29%2F200=10 and u%2Bv=200.
Solve the system.