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Ber [7]
3 years ago
5

What base makes the equation below true? Note: A number should be entered, not a word.

Mathematics
1 answer:
il63 [147K]3 years ago
6 0

Answer:

4

Step-by-step explanation:

in base 4

21 = (2 * 4) + (1 * 1) = 9

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