Question 95273
1.How many liters of 22% salt solution must be added to 75 liters of 67% salt to get a 47% salt solution?
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Let x = no. of liters of 22% solution:
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Resulting amt = (x+75)
:
.22x + .67(75) = .47(x+75)
.22x + 50.25 = .47x + 35.25
.22x - .47x = 35.25 - 50.25
-.25x = -15
x = -15/-.25
x = +60 liters of 22% solution:
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Check:
.22(60) + .67(75) = .47(60+75)
 13.2  +  50.25 = .47(135)
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2. How many gallons of a 40% alcohol solution should be mixed with 15 gallons of 80% solution to obtain a 60% alcohol solution?
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