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OpenStudy (anonymous):
I need help with this question please. An alloy weighing 30 lbs. is 11% tin. The alloy was made by mixing a 15% tin alloy and a 9% tin alloy. How many pounds of each alloy were used to make the 11% alloy? __ lbs. of the 15% alloy and __ lbs. of the 9% alloy.
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