SOLUTION: How many grams of an alloy that is 70% gold should be melted with 20 grams of an alloy that is 10% gold to produce an alloy that is 60% gold?

Question 662494: How many grams of an alloy that is 70% gold should be melted with 20 grams of an alloy that is 10% gold to produce an alloy that is 60% gold?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
How many grams of an alloy that is 70% gold should be melted with 20 grams of an alloy that is 10% gold to produce an alloy that is 60% gold?
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Rwusyionz;
gold + gold = gold
0.7x + 0.10*20 = 0.60(x+20)
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70x + 10*20 = 60x + 60*20
10x = 50*20
x = 100 grams (amt of 70% alloy needed for the mix)
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Cheers,
Stan H.
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