73-19=?

Let's solve the problem step by step:

1. Subtract the ones: Since we can't subtract 9 from 3, we borrow 1 from the tens place. So, we have 13 - 9 = 4.
2. Subtract the tens: Now we have 6 - 1 = 5.

So, 73 - 19 = 54.

Answer: 54