document.write( "Question 136095: Dr. Kingsley took 60 ounces of a 20% gold alloy and mixed it with a 30% gold alloy to get a 24% gold alloy. How many ounces of the 30% gold alloy did he use? \n" ); document.write( "
Algebra.Com's Answer #99675 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Dr. Kingsley took 60 ounces of a 20% gold alloy and mixed it with a 30% gold alloy to get a 24% gold alloy. How many ounces of the 30% gold alloy did he use? \n" ); document.write( "---------------------- \n" ); document.write( "20% DATA: \n" ); document.write( "Amount = 60 oz ; amt. of gold = 0.20*60 = 12 oz \n" ); document.write( "---------------------- \n" ); document.write( "30% DATA: \n" ); document.write( "Amount = x oz ; amt. of gold = 0.30x oz \n" ); document.write( "----------------------- \n" ); document.write( "Alloy DATA: \n" ); document.write( "Amount = x+60 oz ; amt of gold = 0.24(x+60) oz \n" ); document.write( "------------------------- \n" ); document.write( "EQUATION: \n" ); document.write( "gold + gold = gold \n" ); document.write( "12 + 0.30x = 0.24x + 14.4 \n" ); document.write( "0.06x = 2.4 \n" ); document.write( "x = 40 oz (Amount of 30% in the mixture) \n" ); document.write( "=========================================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |