JAMB Mathematics 2016 Objective — Question 42

Question 42 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2016 Objective paper, with the correct answer and a full explanation.

42. 3x-5y=9 (i); 6x-4y=12 (ii). Solve for x and y respectively. A. ¾,1 B. ¾,-1 C. ¾,-1 D. ¾,-1

A. ¾,1
B. ¾,-1Correct
C. ¾,-1
D. ¾,-1

Explanation

Multiplying equation (i) by 2: 6x-10y=18. Subtracting equation (ii) from this: -6y=6, y=-1. Substitute y=-1 into (i): 3x-5(-1)=9 → 3x=4 → x=4/3.

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