How do you let the air out of the brake system?

If it has abs then that requires specific instructions. If it does not have abs the open the right rear bleeder first and have someone gently push the pedal down have step when you crack it open. Close it quickly before the pedal is released. Do this until you get a steady stream. Repeat this for the left rear then the right front then the left front. After all 4 then then repeat all bleeders one more time each. If you get steady stream from all four then your pedal should be solid. Don't forget to keep brake reservoir full of fluid during this procedure.