x+10-1000=16000-820
x+990=15180
x=15180-990
x=14190
X + 10 - 1000 = 15180
X + 10 = 15180 + 1000
X + 10 = 16180
X = 16180 - 10
X = 16170
X+10-1000=16000-820
X+10-1000=15180
X+10 =15180+1000
X+10 =16180
X =16180-10
X =16170
x + 10 - 1000 = 16000 - 820
x + 10 -1000 = 15180
x+10 = 15180 + 1000
x + 10 = 16180
=> x = 16180 - 10
x = 16170
vậy x = 16170