x+100=200-300
ai k mk rui mk k lai
x+200=300-400-500
ai k mk rui mk k lai
x+100=300-500+100
ai k mk rui mk k lai
x+100=200-100-100
ai k mk rui mk k lai
x+100=50.2+100-100+200 -800+1000
ai k mk rui mk k lai
x+90+10=100-40
ai k mk rui mk k lai
\(x+100=200.5+100\)
ai k mk rui mk k lai
x+100=200-300+100
ai k mk 3 cái mk k lại người đó 3 cái
tim x
4-(27-3)=x-(13-4)
ai k mk rui mk k lai