# SOLUTION: 7. A 25% solution of alcohol is to mixed with a 40% solution to get 50 litres of a final mixture that is 30% alcohol. How much of each of the original s

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 Click here to see ALL problems on Mixture Word Problems Question 299719: 7. A 25% solution of alcohol is to mixed with a 40% solution to get 50 litres of a final mixture that is 30% alcohol. How much of each of the original solutions should be used? Answer by checkley77(12569)   (Show Source): You can put this solution on YOUR website!.40X+.25(50-X)=.30*50 .40X+12.5-.25X=15 .15X=15-12.5 .15X=2.5 X=2.5/.15 X=16.667 LITERS OF TH4 40% MIXTURE IS USED. 50=16.666=33.333 LITERS OF THE 25% MIXTURE IS USED. PROOF: .40*16.667+.25*33.333=.30*50 6.667+8.333=15 15=15