Question

D={x:x is a2digit number,the sum of whose digit is 8​

Answer 1

Answer:

x = 1 (or INFINITE)

Step-by-step explanation:

Here, the 2 numbers are the same as given as x : x, which means it is nothing but 1  : 1 as the lowest form....

Now, the sum is 8;

⇒ x + x = 8

⇒ 2x = 8

⇒ x = 4....

Now, as per the question, x : x;

= 4 : 4

⇒ 1 : 1.......

Therefore, D = 1 : 1......

Hope you understood the method I have used.........