1. 

   vally4by New Member

   9 5/13 - ( 7 6/13 - y) = 2 3/13

    

   vally4by, 3 фев 2010

   #1
2. 

   Cobra New Member

   9  5/13 - ( 7  6/13 - y) = 2  3/13
   7  6/13-у=9  5/13 - 2  3/13
   7  6/13 - у = 7  2/13
   у= 7  6/13 - 7  2/13
   у= 4/13

    

   Cobra, 3 фев 2010

   #2