Respuesta :

-40-8=12x
-48=12x
-48/12=x
-4=x
Hello There!

-40 = 12x + 8
-40 + (-8) = (12x + 8) + (-8)
-48 = (12x + 8) + (-8)
x = -4

Hope This Helps You!
Good Luck :)