Tìm số nguyên x để (2x -4) chia hết cho (x - 1) , giúp tớ nhé

`2x-4 vdots x-1`

`=> 2x-2-2 vdots x-1`

`=> 2.(x-1) -2 vdots x-1`

`=> -2 vdots x-1`

`=> x-1 in Ư_((-2)) = {-1; 1 ; -2 ; 2}`

`TH1:` `x-1=1`

`=> x=1+1`

`=> x=2`

`TH2:` `x-1=-1`

`=> x=-1+1`

`=> x=0`

`TH3:` `x-1=-2`

`=> x=-2 +1`

`=> x=-1`

`TH4:` `x-1=2`

`=> x=1+2`

`=> x=3`

`\text{Vậy}` `x in {2;0;-1;3}`