Respuesta :

xiaoline4ever

Answer:  -18.5; -9.5

Step-by-step explanation:

Let x be one of the number, and another number will x + 9.

x + (x + 9) = -28

2x + 9 = -28

2x = -37

x = -18.5

x + 9 = -18.5 + 9 = -9.5