carl.transform.position = characterPosition -- how to set to this specific position but -3 on x axis?

Hello - when my third person controller walks into a collider, he is destroyed, and a new third person controller is set to active in the exact same position, but rotated 180 degrees.

This script works - but I would like the character to be set in the same position as the first third person controller, but -3 on the x axis. I just can't work out how to script this correctly - I tried this line:

 carl.transform.position(new Vector3(characterPosition-3, characterPosition, characterPosition));

But this came up with a lot of errors. How do I transform a character to this character position, but -3 on the x axis?

This is my SetCharacterToActive script (JavaScript):

 var carl : GameObject;
 var vincentCamera : GameObject;
 var thirdPerson : GameObject;
 var script : SwitchCharacters;
 var playerGO : GameObject;  //Should be filled with the GameObject the SwitchCharacters script is attached to
 private var hasPlayed = false;
 
 var characterPosition : Vector3;
 
 function Start () {
 
 carl.SetActive (false);
 vincentCamera.SetActive (false);
 
 }
 
 
 function OnTriggerEnter () {
 
 
 if (!hasPlayed&&!thirdPerson.active){
 
 characterPosition = GetComponent(DestroyCharacterVincent).firstCharacterPosition;
 
 carl.transform.position = characterPosition;
 carl.transform.Rotate(new Vector3(0, 180, 0));
 
 
 carl.SetActive (true);
 vincentCamera.SetActive (true);
 
 
 
 script.cam02 = carl.Find("VincentCamera");
 
 
 script = playerGO.GetComponent(SwitchCharacters);
 script.player02 = carl;
 
 
 hasPlayed = true;
 
 }
 
 }

Thanks so much, Laurien