SOLUTION: How many g of gold should a coin of 45 % gold be if when combined with a 11 g pure gold necklace, it forms a metal that is 71 % gold?
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Question 1033173: How many g of gold should a coin of 45 % gold be if when combined with a 11 g pure gold necklace, it forms a metal that is 71 % gold?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = grams of the 45% gold coin needed
= grams of pure gold in
grams of 45% gold coin
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12.27 grams of the 45% gold coin are needed
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check:
close enough
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