Question

[Gray Cat]

Rút gọn các biểu thức sau:

a/ (71+x) - [(-24) - x] + [(-35) - x ]

b/ x - 34 - [(15 + x) - (23 - x)]

c/ 26 - [(-x) + 126 - 13) + [(-113) + x]

Answer 1

[Nguyễn Xuân Anh]

a/ (71+x) - [(-24) - x] + [(-35) - x ]=71+x+24+x-35-x=x+60

b/ x - 34 - [(15 + x) - (23 - x)]=x-34-15-x-23+x=x-72

c/ 26 - [(-x) + 126 - 13) + [(-113) + x]=26+x-126+13-113+x=2x-200=2(x-100)