Your question has many possible answers.
For example 3 + 20 is 23
But also 10 + 13 is 23
And 8 + 15 is 23
23 plus 7684235 equals 7684258.
8 plus 15 = 23
It equals 435
-23
Who is the idiot that told you that - everyone knows that 23 plus 60 equals 83 !
22
74 + 23 = 97
It is: 157+23 = 180
29 + 23 = 52
21
23
It equals 4567914