Tìm x, Biết: a) $\frac{-3}{4}$x - 1 = $\frac{-1}{6}$ - 2$\frac{5}{9}$ b) $\frac{2}{3}$x - $\frac{3}{2}$ ( x - $\frac{1}{2}$ ) = $\frac{5}{12}$ c) $\frac{2}{3}$ ( 3x - 2 ) + 25%x = -$\frac{9}{6}$

`a)`

`(-3)/4xxx-1=(-1)/6-2(5)/9`

`(-3)/4xxx-1=(-1)/6-23/9`

`(-3)/4xxx-1=(-3)/18-46/18`

`(-3)/4xxx-1=(-49)/18`

`(-3)/4xxx=(-49)/18+1`

`(-3)/4xxx=(-49)/18+18/18`

`(-3)/4xxx=(-31)/18`

`x=(-31)/18:(-3)/4`

`x=62/27`

Vậy `x=62/27`

`b)`

`2/3xxx-3/2xx(x-1/2)=5/12`

`2/3xxx-3/2xxx+3/2xx1/2=5/12`

`(2/3-3/2)xxx+3/4=5/12`

`(-5)/6xxx+3/4=5/12`

`x=(5/12-3/4):(-5)/6`

`x=(2)/5`

Vậy `x=(2)/5`

`c)`

`2/3xx(3xxx-2)+25%xxx=(-9)/6`

`2/3xx3xxx-2/3xx2+1/4xxx=(-3)/2`

`2xxx-4/3+1/4xxx=(-3)/2`

`(2+1/4)xxx-4/3=(-3)/2`

`9/4xxx-4/3=(-3)/2`

`x=((-3)/2+4/3):9/4`

`x=(-2)/27`

Vậy `x=(-2)/27`

$\textit{#Bin}$