MathF.clamp not working!

I'm not sure if i understand what you want to achieve. I wrote this code. I hope it is what you want.

 using UnityEngine;
 using System.Collections;
 
 public class Game$$anonymous$$anager : $$anonymous$$onoBehaviour {
 
     float prev$$anonymous$$ousex = 0f;
 
     private void Start()
     {
         prev$$anonymous$$ousex = Input.mousePosition.x;
     }
 
     private void On$$anonymous$$ouseDrag()
     {
         if (prev$$anonymous$$ousex != Input.mousePosition.x) // if mouse changed position. Simply if dragging...
         {
             float changeAmountx = Input.mousePosition.x - prev$$anonymous$$ousex;
 
             gameObject.transform.localScale = new Vector3($$anonymous$$athf.Clamp(gameObject.transform.localScale.x + (changeAmountx * 0.1f), 2.8f, 7f), gameObject.transform.localScale.y, 1);
 
             prev$$anonymous$$ousex = Input.mousePosition.x;
         }
     }
 }