x-200=500+300
x-200=800
x =800+200
x =1000
K mk nha
Mk sẽ k lại
x + 200 = 500 + 300
x + 200 = 800
x = 800 - 200
x = 600
x+200=500+300
x+200=800
x=800-200
x=600
x+200=500+300
x+200=800
x =800-200
x =600
K mk nha
Mk sẽ k lại
x + 200 = 500 + 300
x +200 = 800
x = 800 - 200
x = 600