89 + x = x +89
100
140 - 35 = 105
They are: 89+97 = 186
70 + 19 = 89 or: the sum of 70 and 19 is 89
89 + x = x +89
100
The sum of 9 times the last digit and the rest of the number is a multiple of 89
-89
Possibility of two digit no whose sum is 17. 89 and 98. Reverse of 98 is 89. The no 89 is 9 less than the no 98. So 98 is original no,89 is new no.
To total 17 the two digits must be 8 and 9! The original number was 98.
140 - 35 = 105
They are: 89+97 = 186
It is: 27+89 = 116
89
70 + 19 = 89 or: the sum of 70 and 19 is 89
34.6 + 89 = 123.6