SOLUTION: Rubbing alcohol is sold in two concentrations : 40% and 60%. If eight litres are mixed together, producing a 55% concentration, how many litres of each strength are used?
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Question 934126: Rubbing alcohol is sold in two concentrations : 40% and 60%. If eight litres are mixed together, producing a 55% concentration, how many litres of each strength are used? Answer by josgarithmetic(39623) (Show Source):
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