Question 219575
Let  x=  amt  added  in  liters
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.1(20) + .05x = .08(20+x),,,drug  amt,,,,,note total  volume  is  x+20
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.(2) +.05x = 1.6 + .08x
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.(.4) = .03 x
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13.33333 = x  in  liters
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check,,,.1*20 +.05*13.33333= .08*33.33333
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2+.667 = 2.6667,,,ok
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