`d) 3(x-1/2)-3(x-1/3)=x`

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

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

`=> -x = 1/2`

`=> x = - 1/2`

Vậy `x = -1/2`

`----------`

`e) (2/3x - 5/7)(x^3-6)=0`

`=> 2/3x-5/7=0` hoặc `x^3-6=0`

`=> 2/3x=5/7` hoặc `x^3=6`

`=> x = 5/7 : 2/3` hoặc `x∅`

`=> x = 15/14`

Vậy `x = 15/14`

`----------`

`f) |2x+7/8| : (-3)/4 = (-1)/2`

`=> |2x+7/8| = (-1)/2 * (-3)/4`

`=> |2x+7/8| = 3/8`

`=> 2x+7/8=3/8` hoặc `2x+7/8=-3/8`

`=> 2x=3/8-7/8` hoặc `2x=-3/8-7/8`

`=> 2x=-1/2` hoặc `2x=-5/4`

`=> x=-1/2:2` hoặc `x=-5/4:2`

`=> x=-1/4` hoặc `x=-5/8`

Vậy `x in {-1/4;-5/8}`