x - 100 = 200 + 300
x - 100 = 500
x = 500 + 100
x = 600
x - 100 = 200 + 300
x - 100 = 500
x = 500 + 100
x= 600
x - 100 = 200 + 300
x - 100 = 500
x = 500 + 100
x = 600
x - 100 = 200 + 300
x - 100 = 500
x = 500 + 100
x = 600
Vậy x = 600
X-100=200+300
X-100=500
X=500+100
X=600
x-100=200+300
x-100=500
x=500+100
x=600