The alloy contains 12% copper, 76% silver and 36 g of gold. What is the weight of the alloy?

Let’s determine the percentage of gold in the alloy, for this we subtract from 100 the percentage of other metals given to us.
100 – 12 – 76 = 12%
12% = 36 g
12 x = 36 g
Then 1% = 3 gr
100 * 3 = 300 grams



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