x + 20 = 40 + 80
x + 20 = 120
x = 120 - 20
x = 100
ai k mk mk k lại
x + 20 = 40 + 80
x+ 20 = 120
x = 120 - 20
x = 100
tk cho to nha Thanh
x + 20 = 120
x = 120 - 20
x = 100
x + 20 = 40 + 80
x + 20 = 120
x = 120 - 20
x = 100
x + 20 = 40 + 80
x + 20 = 120
x = 120 - 20
x = 100
x + 20 = 40 + 80
x + 20 = 120
x = 120 - 20
x = 100
tk nhé
x+ 20 = 120
x = 120- 20
x = 100
x + 20 = 40 + 80
x + 20 = 120
x = 120 - 20
x = 100
k cho mình với
x + 20 = 40 + 80
x + 20 = 120
x = 120 - 20
x = 100
K mình nhé
x + 20 = 40 + 80
x + 20 = 120
x = 120 - 20
x = 100
x+20=40+80
x+20=120
x=120-20
x=100
tks mình nha