x + 400 = 500 x 2
x + 400 = 1000
x = 1000 - 400
x = 600.
x + 400 = 500 x 2
x + 400 = 1000
x = 1000 - 400
x = 600
x + 400 = 500 x 2
x + 400 = 1000
x = 1000 - 400
x = 600
ai tk mk mk tk lại
x + 400 = 500 x 2
x + 400 = 1000
x = 1000 - 400
x = 600
Vậy x = 600
x + 400 = 500 x 2
x + 400 = 1000
x = 1000 - 400
x = 600
x + 400 = 500 x 2
x + 400 =1000
x = 1000 - 400
x = 600
x + 400 = 500 x 2
x + 400 = 1000
x = 1000 - 400
x = 600
tk nha