ECZ 2014 · O-Level Paper 1 — Algebra
Simplify 7a + 2b − 4(3a − b).
- A. −5a − 2b
- B. 19a − 2b
- C. −5a + 6b
- D. −5a − 6b
Verified working — step 1
Expand: −4 × 3a = −12a and −4 × −b = +4b. So 7a − 12a + 2b + 4b = …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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