Question

a number consists of two digit the sum of digit being 9 if 9 is added to the number the digits are reversed find the number

Answer 1

I-10(x)+9-x =9x-9

II-10(9-x)+x =90-9x

therefore= 9x-9=90-9x+9

=18x=108

x=6

9x-9=45

therefore numbers are 54 or 45