The given equation is
[tex] 8-9x=27 [/tex]
To solve for x, we have to subtract 8 to both sides
[tex] 8-9x-9 = 27-8
\\
-9x = 19 [/tex]
Now we need to get rid of -9 from the left side, and for that we do division
[tex] \frac{-9x}{-9} = \frac{19}{-9} [/tex]
[tex] x = - \frac{19}{9} [/tex]