WAEC Mathematics 2012 Objective — Question 12
Question 12 of 50 from the West African Examinations Council (WAEC) Mathematics 2012 Objective paper, with the correct answer and a full explanation.
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If x+y=2y−x+1=5, find the value of x.
- A. 3
- B. 2Correct
- C. 1
- D. -1
Explanation
From x+y=5 (i) and 2y−x+1=5 i.e. 2y−x=4 (ii). Multiply (i) by 2: 2x+2y=10 (iii). Subtract (ii) from (iii): 3x=6, x=2.
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