x - 489 = 1000 - 783
x - 489 = 217
x = 217 + 489
x = 706
k mik nha roi mik k lai hua 100%
x - 489 = 1000 - 783
x - 489 = 217
x = 217 + 489
x = 706
tk mình nha !
x - 489 = 1000 - 783
x - 489 = 217
x = 217 + 489
x = 706
x - 489 = 1000 - 783
x - 489 = 217
x = 217 + 489
x = 706
x-489= 1000-783
<=> x-489=217
x= 217+489
<=> x=706