Question

13. The sum of the digits of a two-digit number is 7. If 9 is added to the number, its digits are reversed. Find
the number​

Answer 1

Step-by-step explanation:

Number obtained on reversing the digits = 10y + x . Now, ⇒ 10y + x = 10x + y + 9 . ⇒ 10x - x + y - 10y = -9

I hope this helps you

Answer 2

Answer:

34

Step-by-step explanation:

the sum of the digits are 7 .

if nine is added to them then it becomes 43 which is reversed of original value