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Zepler [3.9K]
2 years ago
7

I

Mathematics
1 answer:
ludmilkaskok [199]2 years ago
4 0

Answer:

9 blue marbles

Step-by-step explanation:

4 : 3 ratio

12 : x

12 / 4 = 3

4 × 3 : 3 × 3

12 : 9

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