`a)(x-1/2)^2 =1/234`

`(x-1/2)^5 =(1/3)^5`

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

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

`=>x=5/6`

Vậy `x=5/6`

`b)|2x-1|=1+x`

`=>2x-1=1+x` hoặc `2x+1=-1-x`

`=>2x-x=2` hoặc `2x+x=0`

`=>x=2` hoặc `x-0`

`c)|3/5-1/2x|>2/5`

`=>3/5-1/2x>2/5` hoặc `3/5-1/2x<-2/5`

`=>1/2x<1/5` hoặc `1/2x>1`

`=>x<2/5` hoặc `x>2`

Vậy `x \in {2/5;2}`

` Hiển `

` a) ( x - 1/2 )^5 = 1/243 `

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

` => x=1/3+1/2=5/6 `

` b) | 2x-1 | - x = 1 `

` => |2x-1|=1+x `

` => ` \(\left[ \begin{array}{l}2x-1=1+x⇒2x-x=2⇒x=2\\2x-1=-1-x⇒2x+x=0⇒3x=0⇒x=0\end{array} \right.\) 

` c) | 3/5 - 1/2x | > 2/5 `

` => x ≤ 6/5 : 3/5 - 1/2 x > 2/5 `

` => x ≤ 2 - 1/2 x > 2/5 `

` => x ≤ 3/2 x > 2/5 `

` => 1/2 x < 1/5 `

` => x < 2/5 `

` x>6/5 : 1/2 x-3/5>2/5 `

` => x>12/5 x - 3/5 > 2/5 `

` 1/2x>1 `

` => x>2 `

` => ` \(\left[ \begin{array}{l}x>2\\x<\dfrac{2}{5}\end{array} \right.\)