SOLUTION: how many pounds of fresh water must be added to 30 pounds of sea water containing 16% salt (by weight) in order to reduce the percentage of salt to 12%?

Question 419167: how many pounds of fresh water must be added to 30 pounds of sea water containing 16% salt (by weight) in order to reduce the percentage of salt to 12%?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
how many pounds of fresh water must be added to 30 pounds of sea water containing 16% salt (by weight) in order to reduce the percentage of salt to 12%?
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Equation:
salt + salt = salt
0*x + 0.16*30 = 0.12(x+30)
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Multiply thru by 100 to get:
0 + 16*30 = 12x + 12*30
12x = 4*30
x = (1/3)30
x = 10 lbs (amt. of fresh water needed)
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Cheers,
Stan H.
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