minh nha
x=-8 đó bạn
15+21+14-x=2^5:2^4
29+21-x=2
50-x=2
x=50-2
x=48
100 + 900 =1000
= 10 - ( 12 + 9 + 1 )
= 10 - 22
= -12
Nhung sao lai tru
9000 +1000=10000