If ax + a = 3, where a is a nonzero constant, which of the following must be equal to x + 1 ?

The correct answer is:

Hint:
We simplify the given equation to find the value of x + 1
Step-by-step solution:-
ax + a = 3
∴ a (x + 1) = 3
∴ (x + 1) =  -------------- (Dividing both sides by a)
Final Answer:
Option D i.e.  is the correct Option.