document.write( "Question 762230: Tommy can paint a fence in 9 hours. If his friend Huck helps, they can paint the fence in 1 hour. How fast could Huck paint the fence by himself? \n" ); document.write( "
Algebra.Com's Answer #463783 by josgarithmetic(39617)\"\" \"About 
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Uniform rate, and the rate of each person when working together is additive using their rates.\r
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\n" ); document.write( "\n" ); document.write( "Tommy: 1 job per 9 hours, rate is 1/9 jobs per hour.
\n" ); document.write( "Huck: 1/t jobs per hour, we do not know this t.
\n" ); document.write( "Tommy+Huck: 1 job per hour.\r
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\n" ); document.write( "\n" ); document.write( "Look carefully that the units used here are as JOBS PER HOUR, where 1 job means, \"paint the fence\".\r
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\n" ); document.write( "\n" ); document.write( "Rates of each are additive, as already said.
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\n" ); document.write( "Find t.
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