x +1500=1500 +500
x +1500=2000
x =2000-1500
x =500 ai k mk mk k lai sieu hua
x + 1500 = 1500 + 500
x + 1500 = 2000
x = 2000 - 1500
x = 500
x +1500 = 1500+500 x+1500= 2000 x =2000-1500 x =500 Nhớ nhé
x+1500=1500+500
x+1500=2000
x=2000-1500
x=500
x + 1500 = 1500 + 500
x + 1500 = 2000
x = 2000 - 1500
x =500