# SOLUTION: Sterling silver is 92.5% pure silver. How many grams of sterling silver must be mixed to a 90% alloy to obtain a 500g of a 91% silver alloy?

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 Question 426155: Sterling silver is 92.5% pure silver. How many grams of sterling silver must be mixed to a 90% alloy to obtain a 500g of a 91% silver alloy?Answer by jorel1380(2518)   (Show Source): You can put this solution on YOUR website!500x.91=455 m+n=500 .9m+.925n=455 900m+925n=455000 900m+900n=450000 25n=5000 n=200 m=300 You need 300g of 90% alloy to mix with 200g of sterling silver to get your desired alloy..