document.write( "Question 251745: I would love some help with this problem. \r
\n" ); document.write( "\n" ); document.write( "Jack can mow a lawn in 3 hours. Marilyn can mow the same lawn in 4 hours. How much time will it take if they do it together?\r
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\n" ); document.write( "\n" ); document.write( "Thank you so much for any help!!!
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Algebra.Com's Answer #183429 by edjones(8007)\"\" \"About 
You can put this solution on YOUR website!
Jack does 1/3 the job in 1 hr; Marilyn 1/4 in 1 hr.
\n" ); document.write( "1/3 + 1/4
\n" ); document.write( "=4/12 + 3/12
\n" ); document.write( "=7/12 of the job in 1 hr together
\n" ); document.write( "Or 12/7 hrs to do the job together.
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\n" ); document.write( "Ed
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