Space randomly spawned objects evenly

I have objects spawning with the same y value, and a randomly generated x value (0,700). I would like these to spawn only on increments of 50. I know math round rounds to the nearest decimal.... is it possible to have something round to an arbitrary increment like this?

x = self.x - (self.x % 50)

% is modulo which will get the remainder after you divide by that number, so it will return the amount of pixels it is past an increment of 50.

Worked perfectly- thanks!