document.write( "Question 906783: it takes mary 3 hours to do a job that it takes jane. If they work together, they can finish the same job in 2 hours. how long would it take mary to finish the job alone ? \n" ); document.write( "
Algebra.Com's Answer #550196 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
rate for A alone 3
\n" ); document.write( "rate for A & B together 2
\n" ); document.write( "1/a+1/b=1/x
\n" ); document.write( "1/3+1/b=1/2
\n" ); document.write( "1/b=1/2-1/3
\n" ); document.write( "1/b=3/6-2/6
\n" ); document.write( "1/b=1/6
\n" ); document.write( "1/b=1/6
\n" ); document.write( "b=6
\n" ); document.write( "rate for B alone 6
\n" ); document.write( "check
\n" ); document.write( "1/3+1/6=1/2
\n" ); document.write( "6/18+3/18=1/2
\n" ); document.write( "9/18=1/2
\n" ); document.write( "ok\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );