`P=1/2 - 1/2 (x : 1/6 - 1/4) - 2 |3x - 2|`
`=1/2 - 1/2 (6x - 1/4) - 2 |3x-2|`
`=1/2 - 3x + 1/8 - 2 |3x-2|`
`=5/8 - 3x -2 |3x-2|`
TH1:`3x-2 ≥ 0`
`=>P=5/8 - 3x -2 (3x-2)`
`=5/8 - 3x - 6x + 4`
`=37/8 - 9x`
TH2: `3x-2<0`
`=>P=5/8 - 3x -2 (2x-3)`
`=5/8 - 3x - 4+ 6x`
`=3x - 27/8`