x + 20 = 40 + 20
x + 20 = 60
x = 60 - 20
x = 40
Tk mk mk tk lại
x + 20 = 40 + 20
x + 20 = 60
x = 60 - 20
x = 40
Tk mk mk tk lại
X+20=40+20
X+20=60
X=60-20
X=40
x + 20 = 40 +20
x 20 = 60
x = 60 - 20
x = 40
tk mk nha mk nhanh nhất
449999944999944444444999944444444
449999944999944999944999944999999
444444444999944999944999944999999
449999944999944999944999944999999
449999944999944444444999944444444
999999999999999944999999999999999
NHỚ KẾT BẠN VỚI MÌNH NHA! ẤN F3 RỒI ẤN SỐ 4 NHA
x + 20 = 40 + 20
x + 20 = 60
x = 60 - 20
x = 40
x + 20 = 40 + 20
x + 20 = 60
x = 60 - 20
x = 40
k nha nguyen thi lan huong