SOLUTION: Salt is to be added to a 4% salt solution. How many ounces of salt and how many ounces of the 4% solution should be mixed together to get 60 ounces of a 20% salt solution?

Question 545691: Salt is to be added to a 4% salt solution. How many ounces of salt and how many ounces of the 4% solution should be mixed together to get 60 ounces of a 20% salt solution?
Answer by oberobic(2304) (Show Source): You can put this solution on YOUR website!
60 ounces of a 20% salt solution will have .2*60 = 12 oz. salt
.
x = amount of 4% salt solution
60 -x = amount of pure salt to add.
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4%*x + 100%(60-x) = 12
.04*x + 100*(60-x) = 12
.
Multiply both sides by 100 to eliminate decimals.
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4x +6000 - 100x = 1200
.
-96x = -4800
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x = -4800/-96
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x = 50
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50*.04 = 2 oz pure salt in 50 oz. of 4% salt solution
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60-50 = 10 oz pure salt to add to the 50 oz of 4% salt solution to make the required 60 oz of 20% solution.
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Answer: 50 oz. 4% + 10 oz. pure salt solution.
.
Done.
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