document.write( "Question 396338: Fred can mow the lawn in 1 hour. John can mow the lawn in 2 hours. How long will it take them to mow the lawn together? \n" ); document.write( "
Algebra.Com's Answer #281168 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Fred can mow the lawn in 1 hour. John can mow the lawn in 2 hours. How long will it take them to mow the lawn together? \n" ); document.write( "--- \n" ); document.write( "Fred rate = 1 job/hr \n" ); document.write( "--- \n" ); document.write( "John rate = 1/2 job/hr \n" ); document.write( "----------------------- \n" ); document.write( "Together rate = 1/x job/hr \n" ); document.write( "------ \n" ); document.write( "Equation: \n" ); document.write( "rate + rate = together rate \n" ); document.write( "1 + 1/2 = 1/x \n" ); document.write( "---- \n" ); document.write( "Multiply by 2x to get: \n" ); document.write( "2x + x = 2 \n" ); document.write( "3x = 2 \n" ); document.write( "x = 2/3 hr (time to do the job together) \n" ); document.write( "============================================ \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "========== \n" ); document.write( " |