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Oksana_A [137]
3 years ago
9

What comes next in the series 21 18 15 12​

Mathematics
2 answers:
murzikaleks [220]3 years ago
6 0

Answer:

9, 6, 3,0

Step-by-step explanation:

Alex17521 [72]3 years ago
3 0

Answer:

9

Step-by-step explanation:

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