document.write( "Question 146772: This Is a work problem. Please help me solve.\r
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document.write( "If a painter can paint a house in 12 days and another painter can paint
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document.write( "the same house in 8 days, how long will it take the painters together paint the
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document.write( "house?\r
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document.write( " Please show steps.
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document.write( " thanks, \n" );
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Algebra.Com's Answer #107179 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! First painter's rate: 1 house per 12 hours or 1/12 \n" ); document.write( "Second painter's rate: 1 house per 8 hours or 1/8 \n" ); document.write( ". \n" ); document.write( "Let x = combined time it would take BOTH to paint a single house \n" ); document.write( "then \n" ); document.write( "(1/12)x + (1/8)x = 1 \n" ); document.write( "multiplying both sides by a \"common denominator\" (96) we get: \n" ); document.write( "96[(1/12)x + (1/8)x] = 96*1 \n" ); document.write( "8x + 12x = 96 \n" ); document.write( "20x = 96 \n" ); document.write( "x = 96/20 \n" ); document.write( "x = 4.8 hours \n" ); document.write( ". \n" ); document.write( "or (since there are 60 minutes per hour) \n" ); document.write( "x = 4 hrs (.8*60) mins \n" ); document.write( "x = 4 hrs 48 mins \n" ); document.write( " \n" ); document.write( " |