document.write( "Question 754775: An aluminum alloy containing 35% aluminum is to be made by combining 20% and 50% alloys. How many pounds of the 50% alloy must be added to 14 lbs. of the 20% alloy to produce the desired aluminum alloy? \n" ); document.write( "
Algebra.Com's Answer #459297 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! An aluminum alloy containing 35% aluminum is to be made by combining 20% and 50% alloys. How many pounds of the 50% alloy must be added to 14 lbs. of the 20% alloy to produce the desired aluminum alloy? \n" ); document.write( "----------- \n" ); document.write( "Equation: \n" ); document.write( "alum + alum = alum \n" ); document.write( "0.20x + 0.50(14-x) = 0.35*14 \n" ); document.write( "------------------------------- \n" ); document.write( "20x + 50*14 - 50x = 35*14 \n" ); document.write( "-30x = -15*14 \n" ); document.write( "x = 7 lbs (amt. 20% alloy needed) \n" ); document.write( "---------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "---------------------------- \n" ); document.write( " |