WAEC Mathematics 2016 Objective — Question 12
Question 12 of 50 from the West African Examinations Council (WAEC) Mathematics 2016 Objective paper, with the correct answer and a full explanation.
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12. Given that 2x+y=7 and 3x-2y=3, by how much is 7x greater than 10? A. 1 B. 3 C. 7 D. 17
- A. 1
- B. 3
- C. 7Correct
- D. 17
Explanation
Solving simultaneously: y=7-2x, substitute into 3x-2(7-2x)=3 → 7x=17; 17 is greater than 10 by 7.
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