What was the total opponents points for the game were the Oilers scored 21?
CREATE TABLE table_15986020_3 (opponents VARCHAR, oilers_points VARCHAR)
SELECT opponents FROM table_15986020_3 WHERE oilers_points = 21
### Context: CREATE TABLE table_15986020_3 (opponents VARCHAR, oilers_points VARCHAR) ### Question: What was the total opponents points for the game were the Oilers scored 21? ### Answer: SELECT opponents FROM table_15986020_3 WHERE oilers_points = 21