A waiter had 2 customers. After some more arrived he had 26 customers. How many new customers arrived?
The waiter had 2 customers. 
Then, some more arrived and he had 26 customers. 

How many new customers arrived? 

We can solve this problem by using algebra. 

Let's represent the number of customers with the variable "x". 

The waiter had 2 customers. This can be represented as: 

x = 2 

Then, some more arrived and he had 26 customers. This can be represented as: 

x = 26 

Now, we can set these equations equal to each other and solve for "x". 

2 = 26 

This equation does not have a real solution, which means that the problem is impossible.