`x+11` là bội của `x+2`

`=>`\(x+11⋮x+2\)

\(\Rightarrow x+2+9⋮x+2\)

\(\Rightarrow9⋮x+2\left(x+2⋮x+2\right)\)

Ta có : \(x+2\in\text{Ư}\left(9\right)\)

Mà \(\text{Ư}\left(9\right)=\left\{-1;1;-3;3;-9;9\right\}\)

`x+2=-1=> x=-1-2=>x=-3`

`x+2=1=> x=1-2=>x=-1`

`x+2=-3=>x=-3-2=>x=-5`

`x+2=3=>x=3-2=>x=1`

`x+2=-9=>x=-9-2=>x=-11`

`x+2=9=>x=9-2=>x=7` 

Vậy \(x\in\left\{-3;-1;-5;1;-11;7\right\}\)

mong dc tạo  trên mess 

-> trên mess có tạo mà:vvv các nk trc cx zậy

`26 +4( 6x-7)=118`

`=> 4(6x-7)=118 -26`

`=> 4(6x-7)=92`

`=> 6x-7=92:4`

`=> 6x-7= 23`

`=> 6x=23+7`

`=>6x=30`

`=>x=30/6=5`

__

`5(7x-32) +18=68`

`=> 5(7x-32)  =68-18`

`=> 5(7x-32)  =50

`=> 7x-32=50:5`

`=> 7x-32=10`

`=> 7x=10+32`

`=> 7x=42`

`=>x=42/7=6`

__

`112-12:x=109`

`=> 12:x= 112-109`

`=> 12:x= 3`

`=> x=12:3`

`=>x=4`

__

`2(15+9x) -24=78`

`=> 2(15+9x)=78+24`

`=> 2(15+9x)=102`

`=> 15+9x=102:2`

`=>15+9x= 51`

`=> 9x=51-15`

`=>9x=36`

`=>x=36/9=4`

__

`275 -6( 52-3x) =71`

`=> 6( 52-3x) =275-71`

`=> 6( 52-3x) = 204`

`=> 52-3x=204:6`

`=> 52-3x=34`

`=> 3x=52-34`

`=> 3x= 18`

`=>x=18/3=6`

__

`178 -35:x=173`

`=> 35:x=178-173`

`=> 35:x= 5`

`=>x=35/5=7`

__

`94+162:x=175`

`=> 162:x=175-94`

`=> 162:x=81`

`=> x= 162:81`

`=>x=2`

__

`81:x+71=98`

`=> 81:x=98-71`

`=> 81:x= 27`

`=> x= 81/27=3`

__

`58 : (x+7) =2`

`=> x+7=58:2`

`=>x+7= 29`

`=>x=29-7`

`=>x= 22`

__

`75: (52-x)=5`

`=> 52-x=75:5`

`=> 52-x= 15`

`=>x= 52-15`

`=>x= 37`

Thì h cố cho cả 2 đỗ=))

Cố lên, có j 2 đứa cùng trượt=))