Question

The digits of a two-digit number differ by 3. If the digits are interchanged, and the resulting number is added to the original number, we get 143/ What can be the original number?

Answer 1

Step-by-step explanation:

x - y = 3 -- (1)

(10x + y) + (10y + x) = 143

11x + 11y = 143

11( x + y) = 143

x + y = 143/11

x + y = 13 -- (2)

solving 1 & 2, we get,

x = 8, y = 5

the original no.is 85