Discussion

Explanation:

A: 2x - 4 = 2 - x
⇒ 3x = 6 ⇒ x = 2
∴ A - II

B: 7 - 4x = 0
⇒ 4x = 7 ⇒ x = 7/4
∴ B - III

C: x/2 - 3 = 0
⇒ x/2 = 3 ⇒ x = 6
∴ C - IV

D: 2x + 3 = x + 6
⇒ x = 3
∴ D - I

Hence, option (c).

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