Answer:
687
Step-by-step explanation:
The question would help if there were a picture of the problem
however I can say that it should always add up to 180 and subtracted by the interior sum
Answer:
-6
Step-by-step explanation:
3x-x+2
2x+2
2(-4)+2
-8+2
-6
Hope this helps!
#Team Rainbows~