Перемістити об'єкт

Update()

transform.Translate(Vector3.forward * Time.deltaTime * 3);

FixedUpdate()

transform.Translate(Vector3.forward * Time.fixedDeltaTime * 3);

transform.Translate(new Vector3(-0.06f, 0f, 0f));

transform.position = new Vector3(3f, 0f, 0f);

transform.position += new Vector3(3f, 0f, 0f); // ок

transform.Translate(3f, 0f, 0f);