document.write( "Question 142547: sally paints a fence in 6 hours sally and alex paint it in four hours, if alex paints it by himself how long would it take \n" ); document.write( "
Algebra.Com's Answer #103761 by stanbon(75887)\"\" \"About 
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sally paints a fence in 6 hours sally and alex paint it in four hours, if alex paints it by himself how long would it take
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\n" ); document.write( "Sally Data:
\n" ); document.write( "time = 6 hrs/job ; rate = 1/6 job/hr
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\n" ); document.write( "Together Data:
\n" ); document.write( "time = 4 hrs/job ; rate = 1/4 job/hr
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\n" ); document.write( "Alex DATA:
\n" ); document.write( "time = x hrs/job ; rate = 1/x job/hr
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\n" ); document.write( "EQUATION:
\n" ); document.write( "rate + rate = together rate
\n" ); document.write( "1/6 + 1/x = 1/4
\n" ); document.write( "Multiply thru by 12x to get:
\n" ); document.write( "2x + 12 = 3x
\n" ); document.write( "x = 12 hrs (time for Alex to do the job alone)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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