| 
	
	
		
		
		
		 Algebraically speaking, I'd say that the first solution is the correct one, except in the case where a=0.  
 
0 divided by 0 is considered "undefined" because it poses a conflict between two rules. 
		
	
		
		
		
		
			
				__________________ 
				"Give the public everything you can give them, keep the place as clean as you can keep it, keep it friendly" - Walt Disney
			 
		
		
		
		
	
	 |