The original number is 72 
(18+x)/6 = 1+14 
1/6x + 3 = 1 + 14 (Distribute)
1/6x + 3 = (1+14) (Combine Like Terms)
1/6x + 3 = 15 
        - 3 = -3          (Subtract 3 From Both Sides)
1/6x = 12 
(1/6x)*6 = 12 * 6  (Multiply Both Sides By 6)
x = 72
        
             
        
        
        
Answer:

Step-by-step explanation:
The given functions are:
 and
 and 
By algebraic properties of functions;

We perform the long division of the two polynomials as shown in the attachment.
Therefore:

The last choice is correct