Question

Question from Linear equation in one variable
"The digits of a 2-digit number differ by 5. If the digits are interchanged and the resulting number is added to the original number, we get99. Find the original number." (answer fast)

Answer 1

original number is 27 or 72. They differ by 5. If the digits are interchanged and one will be added to another than answer will be 99. So original number is 72 or 27