Question

You deposit $50 in your savings account. One week later, you withdraw $20. Write each amount as an integer

Answer 1

Depositing means that you added 50$ to your account. This means that you account increased by an amount of 50.
The integer describing this is +50.

Then, withdrawing means that you took money from the account. This means that your account decreased by an amount of 20.
This can be expressed as a -20 integer.