Rearrange the equation (x-1)(x-1)(x-1) = y to solve for x

(x - 1)^3 = y

x - 1 = ³√y

x = 1 + ³√y

(x–1)(x–1)(x–1) = y is the same thing as

(x–1)³ = y. Take cube roots of both sides and get

x – 1 = ∛y

x = 1 + ∛y

(x - 1)³ = y

x - 1 = ³√y

x = 1 + ³√y