Answer:
0.8
Step-by-step explanation:
-2.8 + 3.6
Add −2.8 and 3.6 to get 0.8.
= 0.8
Hope it helps and have a great day! =D
~sunshine~
If you simply it down you get

so X can technically be any number
You would just do 5.7-8.1, which is -3.6 degrees Celcius. Hope I helped!
Q+12-2q+44=0
-q=-44-12
q=56