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)\"\" \"About 
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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( "
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