Question

x={(x-3)-[(x-3)-(-x-2)]}=x

Answer 1

Chắc bạn đánh nhầm = thành +

`x+{(x-3)-[(x-3)-(x-2)]}=x`

`=>(x-3)-(x-3-x+2)=x-x`

`=>x-3-(0-1)=0`

`=>x-3-(-1)=0`

`=>x-3+1=0`

`=>x-2=0`

`=>x=2`

Vậy `x=2`

Answer 2

\(x=\left\{\left(x-3\right)-\left[\left(x-3\right)-\left(-x-2\right)\right]\right\}\\ \Rightarrow x=\left[x-3-\left(2x-1\right)\right]\\ \Rightarrow x=x-3-2x+1\\ \Rightarrow x-x+2x=-3+1\\ \Rightarrow2x=-2\\ \Rightarrow x=-1\)

Vậy x = -1