Question

One of
the two digits of a
two digit number is
three times the
other digit. If you
interchange the
digits of this two-
digit number and add
the resulting number
to the original
number, you get 88.
What is the original
number?

Answer 1

let the tens digit be x
then the unit digit is 3x

so the number is 10x + 3x = 13x
the number reversed is 10(3x) + x = 31x

31x + 13x = 88
44x = 88
x = 2
3x = 6

The original number was 26

check:
is 26 + 62 = 88 ? YES
my answer is correct