Question

a number consists of two digits whose sum is 9 . if27 is subtracted from the number its digits are reversed​

Answer 1

Answer:

63

Step-by-step explanation:

let x, y be the two digits.

x+y = 9 ---> equation 1

//when 27 is subtracted the number is reversed.

(10x+y) - 27 = (10y+x)

9x - 9y = 27

x-y = 3 --- > equation 2

Add Equation 1 and 2

x+y = 9

x-y = 3

-----------

2x = 12  ====> x = 6

so y = 3.

Hence the number is 10x + y = 10*6 + 3 = 63