Đáp án:

Giải thích các bước giải:

 `a) 4x + 1/3 = 3/2`

`4x = 3/2 - 1/3`

`4x = 7/6`

`x = 7/6 : 4`

`x =7/6 . 1/4`

`x = 7/24`

Vậy `x=7/24`

`b) 3/7 . x = -1/3 : 2/9`

`3/7 . x = (-1/3) . 9/2`

`3/7 . x = -3/2`

`x = -3/2 : 3/7`

`x = -3/2 . 7/3`

`x = -7/2`

Vậy `x=-7/2`

`c) 3/11 : x -  1 1/11 = -3/22`

`3/11 : x = -3/22 + 1 1/11`

`3/11 : x = -3/22 + 12/11`

`3/11 : x = -3/22 + 24/22`

`3/11 : x = 21/22`

`x = 3/11 : 21/22`

`x = 3/11 . 22/21`

`x= 2/7`

Vậy `x=2/7`

`d) 2x  + 1/2 = -5/3`

`2x = -5/3 - 1/2`

`2x = -10/6 - 3/6`

`2x = -13/6`

`x = -13/6 : 2`

`x = -13/6 . 1/2`

`x = -13/12`

Vậy `x=-13/12`