Question

A number consists of two digits whose sum is 8. If 8 is added to the number its digits are reversed. Find the number.​

Answer 1

Answer:

Let 10x+y be the number

$x + y = 8$

$8 + (10x + y) = (10y + x)$

$8 = 9(x + y)$

$8 = 9(8)$