SOLUTION: A man has two piles of solder (a mixture of tin and lead)available. One pile is 30% tin and the other is 70%. How much of each must be used to make a 20-lb mixture that is 45% tin?
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Question 850757: A man has two piles of solder (a mixture of tin and lead)available. One pile is 30% tin and the other is 70%. How much of each must be used to make a 20-lb mixture that is 45% tin? Answer by josgarithmetic(39617) (Show Source):
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