document.write( "Question 838010: if lisa were to paint her living room alone, it would take 2 hours. Her sister Marie could do the job in 5 hours. How long would it take them working together? \n" ); document.write( "
Algebra.Com's Answer #504821 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
1/2+1/5=1/x
\n" ); document.write( "5/10+2/10=1/x
\n" ); document.write( "7/10=1/x
\n" ); document.write( "10/7=x\r
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