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11 April, 19:36

How much of an alloy with 30% copper must be added to 25 pounds of a second alloy which is 20% copper to create a 27% alloy?

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  1. 11 April, 19:51
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    0.30x + 25 (0.20) = 0.27 (x + 25)

    Can you finish?
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