Andrea has 800L of acid solution. She obtained it by mixing some 7 % acid with some 10 % acid. Her final mixture of 800L is 9.25 % acid. How much of the 7 % and 10 % solutions did she use to make her final mixture?

Question

Kenyon Zhang

Mathematics

24 October, 12:15

Andrea has 800L of acid solution. She obtained it by mixing some 7 % acid with some 10 % acid. Her final mixture of 800L is 9.25 % acid. How much of the 7 % and 10 % solutions did she use to make her final mixture?

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Answers (1)

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Finley Walter · Answer 1

600,200

Step-by-step explanation:

so we need 74L of acid and there is 800L of solution and we get the equation 0.1x+0.07y=74 and x+y=800 so we get x=600 and y=200