What is the number? Seems Simple. Please Help

[hornet]

The tens digit of a two-digit number is two times the ones digit. The reverse of the two-digit number would be thirty-six less than the number. What are the algebraic equations required to figure out the number and what is the number

WORK DONE :

I tried determining what the equations would be in terms of x and y

I initially came up with

x=2y
and
yx=xy-36

but then I realized that xy and yx can not be used as variables.

So the second part of the equation would better be represented by

y = x-36,

but I can't figure out how to put the first part of the equation in terms of x.

 

[Gene]

Not a bad beginning. x=2y
The first number is 10x+y
The second number is 10y+x
10x+y - 36 = 10y+x

 

[hornet]

Thank you so much Gene!