Paul spent 14 of his monthly salary for rent and 17 of his monthly salary for his credit card bill.

[math_celebrity]

Paul spent 14 of his monthly salary for rent and 17 of his monthly salary for his credit card bill. If $714 was left, what was his monthly salary?

We add his left over amount + rent + credit card to get his original salary:
Original Salary = 714 + 14 + 17
Original Salary = $745