Question

The tens digit of a certain number is five more than the units digit. The sum of the digits is 9. Find the number.

Answer 1

72 is the 2-digit number

Explanation:

hope it helps~

Answer 2

Number = 72

Explanation:

unit digit--- x

tens digit--- x + 5

x + x + 5 = 9

2x + 5 = 9

2x + 5 - 5 = 9 - 5

2x = 4

x = 2

2 + 5 = 7

tens digit = 7

number = 72