Find the solution of:

(6x - 1)(3x - 1)(2x - 1) = 4

If we let y = 6x, then the equation is tranformed to:

(y - 1)(y/2 - 1)(y/3 - 1) = 4

Or:

(y - 1)(y - 2)(y - 3) = 2.3.4

The only solution to this equation is clearly y = 5, so x = 5/6.