x + 200 = 800+200
x + 200 = 1000
x = 1000 - 200
x = 800
vậy x =800
k nha
x+200=800+200
x+200=1000
x=1000-200
x=800
x+200=800+200
x+200=1000
x=1000-200
x=800
Tích nha!
x+200=800+200
=x+200=1000
=x - 1000-200
x= 800
x + 200 = 800 + 200
x + 200 = 1000
x = 1000 - 200
x = 800
x+200=800+200
=x+200=1000
x=1000-200
x=800