SOLUTION: How many pounds of pure alcohol must be added to 20 pounds of an 80% pure alcohol to produce an 85% pure alcohol?
0.80(20) = 0.85 (20 + x)
(100)0.80(20) = (100)0.85 (20 + x)
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Question 730666: How many pounds of pure alcohol must be added to 20 pounds of an 80% pure alcohol to produce an 85% pure alcohol?
0.80(20) = 0.85 (20 + x)
(100)0.80(20) = (100)0.85 (20 + x)
80(20) = 85(20+x)
1600 = 1700 + 85x
1600 - 1700 = 1700 + 85x - 1700
-100 = 85x
-100/85 = 85x/85
-1.18 = x
The answer in the book is 6.66lbs.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
pounds of alcohol originally in solution
Let = pounds of alcohol to be added
6.66 pounds of alcohol need to be added
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