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Answer:
D, e - 2b.
Step-by-step explanation:
Check each answer choice using the pattern given:
A. e - c = d because c + d = e. This is correct.
B. b + c = d. This is correct.
C. a + 2b = d because c = a + b. This is correct.
D. e - 2b ≠ d. This is incorrect.
E. f - e = d because d + e = f. This is correct.
Therefore, the only answer that does not equal "d" is D, e - 2b.