document.write( "Question 1110819: Brandon and Chris together can do a piece of work in 12 days. After Brandon has worked alone for 5 days, Chris finishes the work alone in 26 days. In what time can each do the work? \n" ); document.write( "
Algebra.Com's Answer #725820 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Brandon and Chris together can do a piece of work in 12 days. \n" ); document.write( " After Brandon has worked alone for 5 days, Chris finishes the work alone in 26 days. \n" ); document.write( " In what time can each do the work? \n" ); document.write( ": \n" ); document.write( "let b = time required by Brandon working alone \n" ); document.write( "let c = time required by Chris \n" ); document.write( "Let the completed job = 1 \n" ); document.write( ": \n" ); document.write( "Each will do a fraction of the work, the two fractions add up to 1 \n" ); document.write( "\"Brandon and Chris together can do a piece of work in 12 days. \n" ); document.write( " \n" ); document.write( "and \n" ); document.write( "\" After Brandon has worked alone for 5 days, Chris finishes the work alone in 26 days.\" \n" ); document.write( " \n" ); document.write( "1 = 1 therefore \n" ); document.write( " \n" ); document.write( "combine like terms \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "cross multiply \n" ); document.write( "7c = 14b \n" ); document.write( "divide both sides by 7 \n" ); document.write( "c = 2b \n" ); document.write( ": \n" ); document.write( "replace c with 2b in the 1st equation \n" ); document.write( " \n" ); document.write( "multiply by 2b \n" ); document.write( "2(12) + 12 = 2b \n" ); document.write( "24 + 12 = 2b \n" ); document.write( "36 = 2b \n" ); document.write( "b = 36/2 \n" ); document.write( "b = 18 days, Brandon alone \n" ); document.write( "then \n" ); document.write( "c = 2(18) = 36 days Chris alone \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "See if that works in the 2nd statement \n" ); document.write( "\"After Brandon has worked alone for 5 days, Chris finishes the work alone in 26 days. \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |