a)3.x+1=-44 b)5.x-28=-77 c)12-3.x=-36 d)2.(4.x-46)-116=0

$\text{Đáp án + Giải thích các bước giải:}$

`a//3x+1=-44`

`=>3x=-44-1`

`=>3x=-45`

`=>x=-45:3`

`=>x=-15`

`b//5x-28=-77`

`=>5x=-77+28`

`=>5x=-49`

`=>x=-(49)/(5)`

`c//12-3x=-36`

`=>3x=12-(-36)`

`=>3x=12+36`

`=>3x=48`

`=>x=48:3`

`=>x=16`

`d//2(4x-46)-116=0`

`=>2(4x-46)=116`

`=>4x-46=116:2`

`=>4x-46=58`

`=>4x=58+46`

`=>4x=104`

`=>x=26`