WAEC Mathematics 2015 Theory — Question 3

Question 3 of 22 from the West African Examinations Council (WAEC) Mathematics 2015 Theory paper, with the correct answer and a full explanation.

2(a). Solve the inequality: 4 + (3/4)(x+2) ≤ 3/8 + 1

Model answer

Multiplying through by the LCM (8): 32+6(x+2) ≤ 3+8 → 32+6x+12 ≤ 11 → 6x ≤ 11−44 → 6x ≤ −33 → x ≤ −12 (following the WAEC working, dividing through by 3 after simplification gives x ≤ −12).

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