Question

if 9 is added to a certain number, the result is 36. find the number.

Answer 1

let the number be X
9+x=36
x=27

Answer 2

Let the number be x.

Given that 9 is added to the number the result will be 36.

x + 9 = 36

x = 27.


Verification : 

27 + 9 = 36.

Therefore the number is 27.

Hope this helps!