document.write( "Question 838562: joshua can paint a house in 30 hours. it takes andy 60 hours to do the same job. how long would it take both of them to paint the same house if they work together? \n" ); document.write( "
Algebra.Com's Answer #513497 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
1/30+1/60=1/x
\n" ); document.write( "2/60+1/60=1/x
\n" ); document.write( "3/60=1/x
\n" ); document.write( "1/20=1/x
\n" ); document.write( "x=20\r
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