Hello
x + 300 = 500 + 100
x + 300 = 600
x = 600 - 300
x = 300
Hello
x + 300 = 500 + 100
x +300 = 600
x = 600 -300
x = 300
x + 300 = 500 + 100
X+ 300 = 600
X = 600 - 300
X = 300
Ủng hộ nha....!
x + 300 = 500 + 100
x + 300 = 600
x = 600 - 300
x = 300