Jawabanmu

2014-08-07T17:05:04+07:00
Y= 500*500:7000*866:60-7000045
  = 250000:6062000:60-7000045
  = 0,041:60-7000045
  = 6,83-7000045
  =-7000038,17
Semoga benar, dan membantu ya