Tìm `x` `a)4x+1/3=3/2` `b)0,12-3x=1/4` `c)1/2:x-5/3=-7/4` `d)1/3-2/5-3x=3/4`

`Bạn tham khảo nhé :`

`a, 4x+1/3=3/2`

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

`4x=9/6-2/6`

`4x=7/6`

`x=7/6:4`

`x=7/6 . 1/4`

`x=7/24`

`Vậy x=7/24`

`b, 0,12-3x=1/4`

`0,12-3x=0,25`

`3x=0,12-0,25`

`3x=-0,13`

`x=-0,13:3`

`x=-13/300`

`Vậy x=-13/300`

`c, 1/2:x-5/3=-7/4`

`1/2:x=-7/4+5/3`

`1/2:x=-21/12+20/12`

`1/2:x=-1/12`

`x=1/2:(-1)/12`

`x=1/2 . (-12)`

`x=-6`

`Vậy x=-6`

`d, 1/3-2/5-3x=3/4`

`5/15-6/15-3x=3/4`

`(-1)/15-3x=3/4`

`3x=(-1)/15-3/4`

`3x=(-4)/60-45/60`

`3x=-49/60`

`x=-49/60:3`

`x=-49/60 . 1/3`

`x=-49/180`

`Vậy x=-49/180`

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