`#3107.101107`
`(x - 1/3)^3 = -8/27`
`=> (x - 1/3)^3 = (-2/3)^3`
`=> x - 1/3 = -2/3`
`=> x = -2/3 + 1/3`
`=> x = -1/3`
Vậy, `x = -1/3.`
\(\left(\dfrac{x-1}{3}\right)^3=-\dfrac{8}{27}\)
\(\Rightarrow\left(\dfrac{x-1}{3}\right)^3=\left(\dfrac{-2}{3}\right)^3\)
\(\Rightarrow\dfrac{x-1}{3}=\dfrac{-2}{3}\)
\(\Rightarrow x-1=-2\)
\(\Rightarrow x=-2+1\)
\(\Rightarrow x=-1\)
Vậy $x=-1$.