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
-----------------------
12.27 grams of the 45% gold coin are needed
---------------------
check:
close enough
