Question

pls answer fast pls ​

Answer 1

Answer:

51

Step-by-step explanation:

Let the digits be x and y.

x = 5y

(10x + y) + (10y+x) = 66

=> 11x + 11y = 66

=> x + y = 6.

//substitute x = 5y in the above equation

5y + y = 6

=> 6y = 6

=> y = 1

=> x = 5

Thus the original number is 51.