x + 200 = 100 + 900
x + 200 = 1000
x = 1000 - 200
x = 800
Vậy x = 800
x+200=100+900
x+200=1000
x=1000-200
x=800
x + 200 = 100 + 900
x + 200 = 1000
x = 1000 - 200
x = 800
x + 200 = 1000
x = 1000 - 200
x = 800
x + 200 = 100 + 900
x + 200 = 1000
x = 1000 - 200
x = 800
x+200=100+900
x+200=1000
x =1000-200
x =800
x + 200 = 100 + 900
x + 200 = 1000
x = 1000 - 200
x = 800
x + 200 = 100 + 900 x 200 = 1000 x = 1000 -200 x = 800
X + 200 = 100 +900
X+200 = 1000
X = 1000-200
x = 800
x + 200 = 100 + 900
x + 200 = 1000
x = 1000 - 200
x = 800
Vậy x = 800
x + 200 = 100 + 900
x + 200 = 1000
x = 1000 - 200
x = 800
x + 200 = 100 + 900
x + 200 = 1000
x = 1000 - 200
x = 800