Newbie: MYSQL nested query question

[Graham Anderson]

What is the proper way to say this ?

SELECT C.City, N.Distance
FROM Cities C
JOIN Nearbycities N ON C.CityId = N.PrimaryCityId
WHERE  N.CityId =
(SELECT Cities.CityId FROM Cities WHERE Cities.city = 'Los Angeles')
AND N.distance < 20

I am trying to enter in a city and get all the nearby cites with 20 
miles
Somehow, I need to join NearbyCities.PrimaryCityId, Cities.CityId, and 
Cities.city

learning :)