x + 600 = 1000
x = 1000- 600
x = 400
k mk nhe
chuc ban hoc gioi
x + 600 = 600 + 400
x + 600 = 1000
x = 1000 - 600
x = 400
x + 600 = 600 + 400
x = 600 + 400 - 600
x = 400
Vậy : x = 400
x+600=600+400
x+600=1000
x=1000-600
x=400
tk mk mk tk lại
tk mình mình tk lại, thank you very much ^ - ^
x+600=600+400
x+600=1000
x=1000-600
x=400
k mk nha
phamthiminhtrang
x + 600 = 600 + 400
x + 600 = 1000
x = 1000 - 600
x = 400
