We can solve this together! We're beginning with 39454 and removing 10026 from it.

Step 1: We'll start by subtracting the digit 6 and the borrow 0 from 4 in column 1 and get -2.
We add -2 to 10 and get 8 as the first digit of the result.

Step 2: We'll start by subtracting the digit 2 and the borrow 1 from 5 in column 2 and get 2.
2 is the next digit of our result.

Step 3: We'll start by subtracting the digit 0 and the borrow 0 from 4 in column 3 and get 4.
4 is the next digit of our result.

Step 4: We'll start by subtracting the digit 0 and the borrow 0 from 9 in column 4 and get 9.
9 is the next digit of our result.

Step 5: We'll start by subtracting the digit 1 and the borrow 0 from 3 in column 5 and get 2.
2 is the next digit of our result.

So, 39454 - 10026 = 29428.