There are no solutions because no two numbers that add up to six can also add up to four
yes:x+7=18
no:2x+7=36
x+14=36
not enough info:(2×x)+(2×7)=36
2 (x+7)=72
Here is my answer. I left the latter question in a. as I don't actually know the answer. Anyway, I hope this is helpful although not complete.
I would put d. 117 because 180-63= 117 and go by the opposite interior etc. rules.