document.write( "Question 121664: Mary takes 3 hours to complete a task. Mary and Jim together take 2 hours to complete the same task. How long will it take Jim to complete the task working alone? \n" ); document.write( "
Algebra.Com's Answer #89318 by checkley71(8403)![]() ![]() ![]() You can put this solution on YOUR website! 3*j/(3+j)=2 cross multiply \n" ); document.write( "3j=2(3+j) \n" ); document.write( "3j=6+2j \n" ); document.write( "3j-2j=6 \n" ); document.write( "j=6 hours for Jim to complete the task working alone. \n" ); document.write( "proof \n" ); document.write( "3*6/(3+6)=2 \n" ); document.write( "18/9=2 \n" ); document.write( "2=2 \n" ); document.write( " |