Find the Number After 20,000: Sequential Number Challenge

To determine the number that comes before 20,000, follow these steps:

• Step 1: Start by identifying the given number, which is 20,000.
• Step 2: Use the formula for finding the predecessor of a number $x$, which is $x - 1$.
• Step 3: Perform the subtraction: $20,000 - 1$.

Now, let's execute these steps:
Step 1: We know that the given number is 20,000.
Step 2: Applying the predecessor formula, we calculate $20,000 - 1$.
Step 3: This results in $19,999$.

Therefore, the number before 20,000 is $19,999$.