document.write( "Question 896101: A farmer plows the field using a tractor in 5 days. His father can do the same job in 9 days. How many days will it take them working together? \n" ); document.write( "

Algebra.Com's Answer #543318 by Edwin McCravy(20060) $\"\"$ $\"About$

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A farmer plows the field using a tractor in 5 days.
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document.write( "The farmer's rate is 1 field per 5 days or \r\n" );
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document.write( " = \r\n" );
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\n" ); document.write( "His father can do the same job in 9 days.
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document.write( "His father's rate is 1 field per 9 days or \r\n" );
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document.write( " = \r\n" );
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\n" ); document.write( "How many days will it take them working together?
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document.write( "Let the answer be x days.\r\n" );
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document.write( "Then their combined rate is 1 field per x days or \r\n" );
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document.write( " = \r\n" );
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document.write( "The equation comes from:\r\n" );
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document.write( "So\r\n" );
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document.write( "Multiply through by LCD = 45x\r\n" );
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document.write( "Edwin

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