`-1 5/27 - (3x - 7/9)^3 = -24/27`
`⇒ -32/27 - (3x - 7/9)^3 = -24/27`
`⇒ (3x - 7/9)^3 = -32/27 - (-24/27)`
`⇒ (3x - 7/9)^3 = -8/27`
`⇒ (3x - 7/9)^3 = (-2/3)^3`
`⇒ 3x - 7/9 = -2/3`
`⇒ 3x = -2/3 + 7/9`
`⇒ 3x = 1/9`
`⇒ x = 1/9 : 3`
`⇒ x = 1/27`
`Vậy x = 1/27`