document.write( "Question 354084: onjon can do the job in 8 hours. His brother Paul can do the same job in 20 hours. The brothers can do the job together with Paul working one and a half times as long as Jonjon. How long will each other work to do the job together? \n" ); document.write( "
Algebra.Com's Answer #253126 by nerdybill(7384) You can put this solution on YOUR website! Jonjon can do the job in 8 hours. His brother Paul can do the same job in 20 hours. The brothers can do the job together with Paul working one and a half times as long as Jonjon. How long will each other work to do the job together? \n" ); document.write( ". \n" ); document.write( "Let x = time Jonjon works \n" ); document.write( "then \n" ); document.write( "1.5x = time Paul works \n" ); document.write( ". \n" ); document.write( "x(1/8) + 1.5x(1/20) = 1 \n" ); document.write( "Multiply both sides by 40: \n" ); document.write( ". \n" ); document.write( "x(5) + 1.5x(2) = 40 \n" ); document.write( "5x + 3x = 40 \n" ); document.write( "8x = 40 \n" ); document.write( "x = 5 hours (time Jonjon works) \n" ); document.write( ". \n" ); document.write( "Paul: \n" ); document.write( "1.5x = 1.5(5) = 7.5 hours \n" ); document.write( " |