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March 27, 2015

Homework Help: Physics(class) /Math (problem)

Posted by Toulouse on Thursday, October 4, 2012 at 12:18am.

Joe has a ring weighing 16 grams made of an alloy of 20% silver and the rest gold. He decides to melt down the rings and add enough silver to reduce the gold content to 69% . How many grams of silver should he add?

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