i am doing this question for you

Suppose

a = volume of 25% drink (pints) b = volume of 75% drink (pints) 25a + 75b = 45*40 = 1800

a + b = 40 a = 40 - b 25a + 75b = 1800

Substituting value for a

25(40 - b) + 75b = 1800

1000 - 25b + 75b = 1800

1000 + 50b = 1800 50b = 800 b = 16 pints

a = 24 pints

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