Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_72740 ( "Game" real, "Date" text, "Opponent" text, "Result" text, "Oilers points" real, "Opponents" real, "Oilers first downs" real, "Record" text, "Attendance" real )

### Question ###
What was the total opponents points for the game were the Oilers scored 21?

### Accurate SQL ###

SELECT "Opponents" FROM table_72740 WHERE "Oilers points" = '21'