document.write( "Question 275208: jack usually mows his lawn in 4 hours, Marilyn can mow the same lawn in 3 hours, how long will it take them to mow the lawn together? \n" ); document.write( "
Algebra.Com's Answer #200784 by checkley77(12844)\"\" \"About 
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1/4+1/3=1/x
\n" ); document.write( "(4+3)/12=1/x
\n" ); document.write( "7/12=1/x
\n" ); document.write( "7x=12
\n" ); document.write( "x=12/7=1.7143 hours working together..
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