sgriderjr4084 sgriderjr4084 29-02-2024 Social Studies contestada Prove the following statements. These exercises are cumulative, covering all techniques addressed in Chapters 4-7. 1. Suppose x e Z. Then xis even if and only if 3x+5 is odd. 2. Suppose x ∈ Z. Then x is odd if and only if 3x + 6 is odd.