Question

Number is consists of two digits whose sum is 8. if 18 is added to the number it's digit are revised. find the number

Answer 1

Answer:

Step-by-step explanation:

our number is xy, which means 10x+y.

the sum of the 2 digits is 8, so x+y = 8 

if we add 18 to the number, ie 10x+y+18 the result is then yx (ie 10y+x)

--> 10x+y+18 = 10y+x

--> 9x + y + 18 = 10y

--> 9x - 9y + 18 = 0

--> 9x - 9y = -18

--> x - y = -2 

The number is 35