Question

Ir 9-6x=45, find the value of x-4

Answer 1

9 - 6x = 45 
-9               -9
_____________
-6x = 54 
 
  x = -9 

________________________
So when you plug that answer into x-4 you get -9 -4, which equals -13. 

Answer 2

9 - 6x = 45 
----        -----
-9          -9

-6x = 54

x = -9

Hope I helped:P