document.write( "Question 1169315: A master painter can paint the room in 5 hours, while his apprentice can do the same job in 7 hours. In how many hours will they paint the room if they work together? \n" ); document.write( "
Algebra.Com's Answer #793997 by Boreal(15235)\"\" \"About 
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in 1 hour paints 1/5 and in x hours x/5
\n" ); document.write( "the other paints 1/7 in 1 hour and x/7 in x hours.
\n" ); document.write( "Together they paint 1 room
\n" ); document.write( "so (x/5)+(x/7)=1
\n" ); document.write( "multiply by 35
\n" ); document.write( "5x+7x=35
\n" ); document.write( "x=35/12 hours or 2 11/12 hours
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