Answer:
Martha wrote 6 2,000-word essays.
Explanation:
15,000 (words total) - 3,000 (3 1,000-word essays) = 12,000 (words left for the 2,000-word essays).
Since the rest of the essays were 2,000 words, we can divide 12,000 by 2,000 to get 6.
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