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Omni-MATH / An integer x is chosen so that 3x+1 is an even integer. Which of the following must be an odd integer? (A) x+3 (B) x−3 (C) 2x (D) 7x+4 (E) 5x+3 · Discussion

Discussing An integer x is chosen so that 3x+1 is an even integer. Which of the following must be an odd integer? (A) x+3 (B) x−3 (C) 2x (D) 7x+4 (E) 5x+3 · Omni-MATH

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