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Sagot :
Answer
Maya uses 200 millimeters of solution B.
Explanation
Let the amount of the first solution mixed be A
Let the amount of the second solution mixed be B
First solution is 14% alcohol
Alcohol content = 0.14A
Second solution is 11%
Alcohol content = 0.11B
She uses twice as much solution A as solution B
A = 2B
Resulting mixture = A + B
Alcohol content in resulting mixture = 0.14A + 0.11B = 78
Recall, A = 2B
0.14A + 0.11B = 78
0.14(2B) + 0.11B = 78
0.28B + 0.11B = 78
0.39B = 78
Divide both sides by 0.39
(0.39B/0.39) = (78/0.39)
B = 200 millimeters
A = 2B = 2(200) = 400 millimeters
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