document.write( "Question 314486: ben can paint a face in 3 hours and billy takes 4. How many hours will it take them to painting together? \n" ); document.write( "
Algebra.Com's Answer #224852 by nerdybill(7384)\"\" \"About 
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ben can paint a face in 3 hours and billy takes 4. How many hours will it take them to painting together?
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\n" ); document.write( "Let x = time it takes for them to paint it together
\n" ); document.write( "then
\n" ); document.write( "x(1/3 + 1/4) = 1
\n" ); document.write( "x(4 + 3) = 12
\n" ); document.write( "7x = 12
\n" ); document.write( "x = 12/7 hours
\n" ); document.write( "or
\n" ); document.write( "x = 1 hour and 43 minutes
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