Question

When you owe money, you have a negative balance. You owe $200 to your bank. You pay $30 back. What is your new bank balance?

Answer 1

take 200 and subtract it by 30 and that will give you the amount  of -170

Answer 2

Your new bank balance would just be 200 - 30 or in this case -200 + 30 which would equal your new balance, $-170