Respuesta :

Equanimity
Let's look for a pattern here since it's a sequence of numbers.
20 to 16 is -4. 16 to 12 is -4.
-4 is the rule.
12 -4 = 8 our 4th term is 8.
8, 4, 0, -4, -8, -12, -16, -20, -24.
-24 is the 12th term within this sequence.
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The 12th term in the sequence 20, 16, 12... is:

-24