document.write( "Question 1133629: Manuel can build a house in 45 days. With Errol’s help they can build the house in 30 days. How long
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Algebra.Com's Answer #750876 by Alan3354(69443)\"\" \"About 
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Manuel can build a house in 45 days. With Errol’s help they can build the house in 30 days. How long would it take Errol to build the same house by himself?
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\n" ); document.write( "To do this type of problem, invert and use \"house per day\" instead of days per house.
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