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WAEC Mathematics 2009 Question 15

Question 15

Inequalities

Which of the following illustrates the solution of (3x + 4)/2 < x + 3?

Diagram for this question
  1. A.Diagram A
  2. B.Diagram B
  3. C.Diagram C
  4. D.Diagram D
Show the answer and explanation

Answer: D (Diagram D)

Explanation

Multiply by 2: 3x + 4 < 2x + 6, so x < 2. Use an open circle at 2 (2 is not included) and shade to the left.