document.write( "Question 81310: Katrina can mow the lawn in 2 hours. It takes her brother 3 hours to mow the lawn. When they borrow a neighbor's lawn mower and work together, how long does it take them to mow the lawn? \n" ); document.write( "
Algebra.Com's Answer #58259 by stanbon(75887)\"\" \"About 
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Katrina can mow the lawn in 2 hours. It takes her brother 3 hours to mow the lawn. When they borrow a neighbor's lawn mower and work together, how long does it take them to mow the lawn?
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\n" ); document.write( "Katrina DATA:
\n" ); document.write( "Time to mow the lawn = 2 hrs/job ; Rate = 1/2 job/hr
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\n" ); document.write( "Brother DATA:
\n" ); document.write( "Time to mow the lawn = 3 hrs/job ; Rate = 1/3 job/hr
\n" ); document.write( "-------------
\n" ); document.write( "Together DATA:
\n" ); document.write( "Time to mow the lawn = x hrs/job ; Rate = 1/x job/hr
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\n" ); document.write( "EQUATION:
\n" ); document.write( "rate + rate = rate together
\n" ); document.write( "1/2 + 1/3 = 1/x
\n" ); document.write( "3x+2x = 6
\n" ); document.write( "5x=6
\n" ); document.write( "x=6/5 of an hour or 1 hr and 12 minutes
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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