X + 50 = 100 - 40
X + 50 = 60
X = 60 - 50
X = 10
ai tk mik mik tk lai , mik hua !!
X + 50 = 100 - 40
X + 50 = 60
X = 60 -50
X = 10
X + 50 = 100 - 40
X + 50 = 60
x = 60 - 50
x = 10
x + 50 = 100 - 40
x + 50 = 60
x = 60 - 50
x = 10
Vậy x = 10
x + 50 = 100 - 40
x + 50 = 60
x = 60 - 50
x = 10
x + 50 = 100 - 40
x + 50 = 60
x = 60 - 50
x = 10
chúc bn hk giỏi nha