Respuesta :

Answer:

8. -11.4

9. 3.9

Step-by-step explanation:

Answer:

#8 is -11.4 and #9 is 3.9

Step-by-step explanation

#8

first you do 11.4-5.7= 5.7

next subtract it to the other side and you get -11.4

#9

first do 2.8-3.9=-1.1

then add that to the other side and you get 3.9