document.write( "Question 709181: Amy can clean the house in 9 hours. When she works together with Tom, the job takes 5 hours. How long would it take Tom, working by himself, to clean the house? \n" ); document.write( "
Algebra.Com's Answer #436412 by josgarithmetic(39620)\"\" \"About 
You can put this solution on YOUR website!
Same job, each worker different rates.\r
\n" ); document.write( "\n" ); document.write( "\"R%5Ba%5D\" Amys' rate
\n" ); document.write( "\"R%5Bt%5D\" Toms' rate (Our unknown variable to find)
\n" ); document.write( "\"R%5Bs%5D\" Sum of their rates working together\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"R%5Ba%5D%2BR%5Bt%5D=R%5Bs%5D\"
\n" ); document.write( "From given,
\n" ); document.write( "\"1%2F9%2BR%5Bt%5D=1%2F5\"
\n" ); document.write( "\"R%5Bt%5D=1%2F5-1%2F9\"
\n" ); document.write( "\"R%5Bt%5D=%289-5%29%2F45\"
\n" ); document.write( "\"highlight%28R%5Bt%5D=4%2F45%29\", as jobs per hour.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "If you want as how many HOURS per JOB, then use reciprocal.
\n" ); document.write( "\"highlight%2845%2F4=11%261%2F4%29\", hours per job.
\n" ); document.write( "
\n" );