document.write( "Question 218910: Andrew takes eighteen hours to complete a certain project alone. he had worked six hours on the project when Dylan joined him to finish the project. Together they finished the project in six more hours. How many hours does it take for Dylan to complete the entire project alone? \n" ); document.write( "
Algebra.Com's Answer #164838 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Andrew takes eighteen hours to complete a certain project alone. \n" ); document.write( " he had worked six hours on the project when Dylan joined him to finish the project. \n" ); document.write( "Together they finished the project in six more hours. \n" ); document.write( "How many hours does it take for Dylan to complete the entire project alone? \n" ); document.write( ": \n" ); document.write( "Let t = time required by Dylan alone \n" ); document.write( ": \n" ); document.write( "Let the completed job = 1 \n" ); document.write( ": \n" ); document.write( "Andrew will work a total of 12 hrs \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( "Multiply equation by 18t, results: \n" ); document.write( "12t + 18(6) = 18t \n" ); document.write( "12t + 108 = 18t \n" ); document.write( "108 = 18t - 12t \n" ); document.write( "108 = 6t \n" ); document.write( "t = \n" ); document.write( "t = 18 hrs is D's time alone also \n" ); document.write( " |