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A metal worker has a metal alloy that 30% copper and another one is 55% copper. how many kilograms of each alloy should the metalworker combine to make 50kg of a 50% copper alloy?
9 years ago

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Steve
If there are x kg of 30% alloy, then consider the total amount of copper in each part. It must add up to the total in the final alloy.

.30x + .55(50-x) = .50*50
9 years ago

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