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O-LevelMathematicsAlgebra and graphs4024/21 · Oct/Nov 2025 · Q214 Marks

Rearrange the formula to make a the subject. w = (2a+5) / (3a-1)

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2025). The mark or mark type is shown in brackets.

21 (w+5)/(3w-2) or (-w-5)/(2-3w) oe final answer [4] M1 for w(3a – 1) = 2a + 5 M1 for expanding the bracket in their equation M1 isolating terms in a M1 for factorising using a and for division by bracket to final answer Max M3 if answer incorrect

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About this question

Topic: Algebra and graphs, O-Level Mathematics (syllabus 4024). Structured question, 4 marks.
Source: O-Level Mathematics, Oct/Nov 2025 Paper 2 Variant 1, question 21.

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