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QUESTION
Joe has a ring weighing 18 grams made of an alloy of 18 % silver and the rest gold. He decides to melt down the rings and add enough silver to reduce...
Joe has a ring weighing 18 grams made of an alloy of 18 % silver and the rest gold. He decides to melt down the rings and add enough silver to reduce the gold content to 65% . How many grams of silver should he add?
