SOLUTION: One solution is 10% acid and another is 25%acid. Howmany litres ofeach should be mixed to form 30L of a solution that is 18% acid?

Question 73485: One solution is 10% acid and another is 25%acid. Howmany litres ofeach should be mixed to form 30L of a solution that is 18% acid?
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Let x = the required number of liters of 10% acid solution, then (30-x) = the required number of liters of 25% acid solution. The sum of these will make up the 30 liters of 18% acid solution. After changing the percentages to their decimal equivalents, we can write the necessary equation to solve for x.
Simplify and solve for x.
Combine like-terms.
Subtract 7.5 from both sides.
Divide both sides by -0.15
and =
Solution:
You will need 14 liters of 10% acid solution plus 16 liters of 25% acid solution to make 30 liters of 18% acid solutution.

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