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JAMB Mathematics 1984 Question 33

Question 33

Inequalities

Find all integral values of x which satisfy the inequalities −3 < 2 − 5x < 12

  1. A.−2, −1
  2. B.−2, 2
  3. C.−1, 0
  4. D.0, 1
  5. E.1, 2.
Show the answer and explanation

Answer: C (−1, 0)

Explanation

Subtract 2: −5 < −5x < 10. Divide by −5 and reverse the signs: −2 < x < 1. The integers are −1 and 0.