SOLUTION: How many grams of a gold alloy that cost $4.00 per gram must be mixed with 30g of a gold alloy that cost $7.00 per gram to make an alloy costing $5.00 per gram?
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Question 1003857: How many grams of a gold alloy that cost $4.00 per gram must be mixed with 30g of a gold alloy that cost $7.00 per gram to make an alloy costing $5.00 per gram? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! How many grams of a gold alloy that cost $4.00 per gram must be mixed with 30g of a gold alloy that cost $7.00 per gram to make an alloy costing $5.00 per gram?
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Equation:
value + value = value
7*30 + 4x = 5(30+x)
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7*30 + 4x = 5*30 + 5x
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x = 2*30
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x = 60 (amt. of $4.00 alloy needed)
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Cheers,
Stan H.
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