The sum of the digits in a number is 9. The tens digit is five more than the ones

Question

I need help finding the number

Answer 1

1's digit = x

10's digit = y

 

Your number is 10y + x

 

x+y = 9

y = x+5

 

x + (x+5) = 9

2x + 5 = 9

2x = 4

x = 2

 

y = x+5 = 7

 

Your number is 72