SOLUTION: How many g of gold should a coin of 56% gold be if when combined with a 7 g 100% gold necklace, it forms a metal that is 67% gold?
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Question 944486: How many g of gold should a coin of 56% gold be if when combined with a 7 g 100% gold necklace, it forms a metal that is 67% gold?
Answer by vleith(2983) (Show Source): You can put this solution on YOUR website!
Let the gold coin's weight be represented by C.
You are told the coin is 56% gold. That gold is then melted with 7g of pure gold. So how much many grams does the coin weigh if the total at the end is 67% gold by weight?
So the original coin weighs 21 grams
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