document.write( "Question 588797: jack usually mows the lawn in 3 hours. Sally mows the same yard in 4 hours. How much time would it take for them to mow the lawn together? \n" ); document.write( "
Algebra.Com's Answer #374620 by richwmiller(17219)\"\" \"About 
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x/3+x/4=1
\n" ); document.write( "4x+3x=12
\n" ); document.write( "7x=12
\n" ); document.write( "x=12/7=1.71429 hours
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