Answer:
The answer is 46 units
Step-by-step explanation:
You were correct in multiplying 12 by 4. However, you forgot to notice that the corners of every square were only shaded halfway. All you have to do then is subtract 48 by 2. 
 
        
             
        
        
        

we needed to eliminate w, do so by diving both sides by w and obtain the above result :)
Hope this helps.
 
        
             
        
        
        
What is the equation you are solving?
 
        
                    
             
        
        
        
Answer:
The answer is C!!! blah blah blah 20 characters long 
 
        
                    
             
        
        
        
Answer:
B
Step-by-step explanation: