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

Answer:

85

Step-by-step explanation:

let original number

10x+y

x-y=3 (according to question)_____(1)

also we add to reverse digits and it's original we get 143 ( according to question)

10x+y+10y+x=143

11x+11y=143

11(x+y)=143

=>x+y=13________(2)

add (1) and (2)

2x=16=>x=8

y=5

so

original digit = 10x+y=10×8+5=85