The sum of the digits of two-digits number is 12. The tens digit is 2 more than the units digit.Find the number.

Let xy - the 2-digit number x - the tens digit y - the ones digit x + y = 12 x = 2 + y 2 + y + y = 12 2y + 2 = 12 2y = 12 - 2 2y = 10 y = 5 the ones digit x = 2 + y x = 2 + 5 x = 7 the tens digit 7 and 5 are the numbers