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): You can put this solution on YOUR website!
4x + 30(7) = 5(x + 30)
Can you solve for x now?
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