-4,-4 - 9,-1 is the answer, i think
Answer:
x = 8 - 3y
Step-by-step explanation:

Hope this helps.
Answer:
0,1,2,3,4,5
Step-by-step explanation:
You can not buy more than 5 books because you'd have a negative amount of money. So 0,1,2,3,4,5 are the possible values for b.