If 2x 4 = 0, then x = 2. x 2 Therefore, 2x 4
Question:
If 2x – 4 = 0, then x = 2.
x ≠ 2
Therefore, 2x – 4 ≠ 0.
Determine whether each argument in Problems 9–28 is valid or invalid. If valid, name the type of reasoning and if invalid, determine the error in reasoning.
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