document.write( "Question 903288: A 20-lb bag cement mix contains 25% cement. How many pounds of pure cement must be added to the mixture in order to get 40% cement? \n" ); document.write( "
Algebra.Com's Answer #547896 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! 1*x+0.25*20=0.4(20+x) \n" ); document.write( "1*x+5=8+0.4x \n" ); document.write( "1x-0.4x=8-5 \n" ); document.write( "0.6x=3 \n" ); document.write( "x=5 lbs of 100% is added to 20 lbs of 25% to get 25 lbs at 40% \n" ); document.write( "check \n" ); document.write( "1*5+0.25*20=0.4(20+5) \n" ); document.write( "5+5=0.4(25) \n" ); document.write( "10=10 \n" ); document.write( "ok \n" ); document.write( " \n" ); document.write( " |