ECZ 2015 · O-Level Paper 1 — Relations and Functions
Given that f(x) = 2x + 78 and g(x) = 3x − 66, find the value of x if f(x) = g(x).
- A. 7.5
- B. −7.5
- C. 3.75
- D. 15
Verified working — step 1
Set the two rules equal and cross-multiply to clear both denominators in one move.The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
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