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
8. -11.4
9. 3.9
Explanation:
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