L = liters of 18% to be added
.18L + .3 = .2(L + 1)
Multiply by 100
18L = 30 = 20L + 20
2L = 10
L = 5
Winter A.
asked • 10/12/18How many liters of 18% alcohol solution should a pharmacist add to one liter of a 30% alcohol solution to make a 20% alcohol solution?
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