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Ber [7]
3 years ago
8

15) n-4-9

Mathematics
1 answer:
marshall27 [118]3 years ago
6 0

Answer:

...

Step-by-step explanation:

15) n - 13

16) 3n

17) 12x - 9

18) -k

19) -20n

20) -4n

21) 3 - 21m

22) 16n + 18

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