SOLUTION: how many grams of gold alloy that costs $4 per gram must be mixed with 30 grams of a gold alloy that costs $7 per gram to make an alloy that costs $5 per gram?
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Question 298047: how many grams of gold alloy that costs $4 per gram must be mixed with 30 grams of a gold alloy that costs $7 per gram to make an alloy that costs $5 per gram? Answer by nyc_function(2741) (Show Source):
