`a, (0,4x-2) -(1,5x+1) - (-4x -0,8)=3,6`

`<=> 0,4x-2 - 1,5x -1 +4x +0,8=3,6`

`<=>(0,4x -1,5x +4x) + (-2-1+0,8)=3,6`

`<=> 2,9x-2,2=3,6`

`<=> 2,9x=5,8`

`<=> x=2`

Vậy `x=2`

`(3/4x +5) - (2/3x-4) - (1/6x+1) = (1/3x+4)-(1/3x-3)`

`<=>3/4x +5- 2/3x+4 -1/6x -1 = 1/3x+4 - 1/3x+3`

`<=>3/4x +5- 2/3x+4 -1/6x -1 -1/3x -4 + 1/3x -3=0`

`<=> (3/4x -2/3x -1/6x -1/3x +1/3x) + (5+4-1-4-3)=0`

`<=>-1/12x+1=0`

`<=> -1/12x=-1`

`<=> x= 12`

Vậy `x=12`