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X would be -3.
hops this helps mark me brainlist
9. 2,000
10. 3,200
11. 3,000
12. 1,800
13. 120
14. 125
15. 75
16. 30
17.
18.
I can't see the last two
Answer:
27 students
Step-by-step explanation:

cross multiply and you get 27