ECZ 2020 · O-Level Paper 1 — Index Notation
Solve the equation 3x + 3 = 275.
- A. 12
- B. 2
- C. 18
- D. 5
Verified working — step 1
27 = 3³, so 27⁵ = 3¹⁵. Then 3x + 3 = 3¹⁵ ⇒ x + 3 = 15 ⇒ x = …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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