document.write( "Question 107435: Larry takes 2 hours to paint a house.Willy takes 4 hours to paint the same house.David takes 8 hours to paint that house.How long would it take them to paint the house, working together?
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Algebra.Com's Answer #78203 by edjones(8007)![]() ![]() You can put this solution on YOUR website! Larry does 1/2 the job in 1 hr. \n" ); document.write( "Willy does 1/4 job in 1 hr \n" ); document.write( "David does 1/8 job in 1 hr. \n" ); document.write( "Let x = time \n" ); document.write( "1/2+1/4+1/8 \n" ); document.write( "=4/8+2/8+/8 \n" ); document.write( "=7/8 job in 1 hr \n" ); document.write( "Just flip the equation to find out how long it takes. \n" ); document.write( "8/7 hr = 1 1/7 hr = 1 hr 60/7 min = 1 hr 9 min (approx) \n" ); document.write( "Ed \n" ); document.write( " \n" ); document.write( " |