move object using transform.position in x axis code example

Example 1: unity set position

// To set the position of a gameobject use the following
GameObject.transform.position = new Vector3(x, y, z);

Example 2: hot to move pobject unity

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    void Update()
    {
        // Move the object forward along its z axis 1 unit/second.
        transform.Translate(Vector3.forward * Time.deltaTime);

        // Move the object upward in world space 1 unit/second.
        transform.Translate(Vector3.up * Time.deltaTime, Space.World);
    }
}