document.write( "Question 371022: Anne and Nancy use a metal alloy that is 15% copper to make jewelry. How many ounces of 10% alloy must be mixed with a 21% alloy to form 121 ounces of the desired alloy? \n" ); document.write( "
Algebra.Com's Answer #264342 by robertb(5830)![]() ![]() You can put this solution on YOUR website! x = #oz. of 10% alloy, \n" ); document.write( "121-x = #oz. of 21% alloy. Then \n" ); document.write( "0.10x + 0.21(121 - x) = 0.15*121, \n" ); document.write( "0.10x + 25.41-0.21x = 18.15, \n" ); document.write( "-0.11x = -7.26, \n" ); document.write( "x = 66 oz, amount of 10% alloy, \n" ); document.write( "121 - x = 55 oz, amount of 21% alloy. \n" ); document.write( " \n" ); document.write( " |