<h2>
Answer:</h2>
The inequality which is equivalent to the given inequality is:
         D.   
<h2>
Step-by-step explanation:</h2>
We are given a inequality as:
                
which on simplifying gives.
i.e. on adding 8 on both side of the inequality we get:
       
A)
        
on simplifying we gets:
    
which does not matches the actual inequality.
Hence, option: A is incorrect.
B)
           
on solving we get:
 
which is not equivalent to the given inequality.
Hence, option: B is incorrect.
C)
           
on simplifying we get:
  
Now on adding both side of the inequality by 6 we get:
     
which again does not matches.
Hence, option: C is incorrect.
D)
           
on simplifying we get:
      
It matches the actual expression.
       Hence, option: D is correct.