SOLUTION: Pure acid is to be added to a 5% acid solution to obtain 95L of 89% solution. What amounts of each should be used?

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Question 427939: Pure acid is to be added to a 5% acid solution to obtain 95L of 89% solution. What amounts of each should be used?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
0.05x + 1.00(95 - x) = 0.89*95
==> 0.05x + 95 - x = 84.55
==> -0.95x = -10.45
==> x = 11 liters, the amount of 5% acid solution, and
95 - x = 84 liters, the amount of 89% acid solution.