SOLUTION: A copper alloy that is 40% copper is to be combined with a copper alloy that is 80% copper to produce 120 kilograms of an alloy that is 70% copper. How many kilograms of each alloy
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Question 334722: A copper alloy that is 40% copper is to be combined with a copper alloy that is 80% copper to produce 120 kilograms of an alloy that is 70% copper. How many kilograms of each alloy must be used? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A copper alloy that is 40% copper is to be combined with a copper alloy that is 80% copper to produce 120 kilograms of an alloy that is 70% copper. How many kilograms of each alloy must be used?
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Equation:
copper + copper = copper
0.40x + 0.80(120-x) = 0.70*120
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Multiply thru by 100 to get:
40x + 80*120 - 80x = 70*120
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-40x = -10*120
x = (1/4)120
x = 30 kg (amt. of 40% alloy needed in the mixture.
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Cheers,
Stan H.
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