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26-06-2018
Mathematics

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how much of an alloy that is 40% copper should be mixed with 400 ounces of an alloy that is 60% copper in order to get an alloy that is 50%

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wolf1728 wolf1728

26-06-2018

You have 400 ounces of 60% copper alloy.How many ounces of 40% must be added to make it 50%?
.60 * 400 + .40x = .50 * (400 + x)240 + .40x = 200 + .5x40 = .1xx = 400 ounces of 40% must be added.

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