x + 200 = 400 - 200 x - 200 = 400 - 300
x + 200 = 200 x - 200 = 100
x = 200 - 200 x = 100 + 200
x = 0 x = 300
k nhé Chicchana Mune No Tokimeki thuy linh
x + 200 = 400 - 200
x + 200 = 200
x = 200 - 200
x = 0
x - 200 = 400 - 300
x - 200 = 100
x = 100 + 200
x = 300
x+200=400-200
x+200=200
x=200-200
x=0
x-200=400-300
x-200=100
x=100+200
x=300