Respuesta :

-18s + 24 = -9s - 12
+18s + 24 = -18s - 12

24 = 9s - 12
+12 = 9s +12
--------------------
36 = 9s


36 = 9s
----   ----
9       9 

s = 4
Lets see what we're working with here

-18(s) + 24 - [-9] (s) = ?

Take out your "like terms" 
  -9(s) + 36

First,  we have to 'solve' the number -9 which is equal to 0

Solve this one too (only if you want to it to make it easier) (s) - 4 = 0
         We have to add a positive four to your sides (+4)

We have found one solution in this equation

The value of "S" is 4

[tex]s = 4 [/tex]

[tex]Good Luck!!!!!! [/tex]