Question

x + 600 = 600 + 60

 

Answer 1

X+600=600+60

X+600=660

X=660-600

X=60

Answer 2

x + 600 = 600 + 60

x + 600 = 660

          x = 660 - 600

           x = 60

ai k mk mk k lại nhé ^_^