ECZ 2015 · O-Level Paper 1 — Algebra
Simplify 7m − 2(3n − m) − 9n.
- A. 5m − 15n
- B. 9m − 3n
- C. 9m − 15n
- D. 5m − 3n
Verified working — step 1
Expand the bracket first - the -2 hits both terms, and -2 × (-m) comes out POSITIVE.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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