Answer:
The correct answer is D:-15,120
-18x-6x=-5
-24x=-5
x=5/24
This is your answer, my dear~
For letter the answer is 2
for letter b the answer is 1
For number 11 i think it's the first one or the third.
For 12 i think it's the third or fourth
For 13 I think its d
for 14 it's a
For 15 it's, well i cant really see it so sorry hoped this helped