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O-LevelMathematicsAlgebra and graphs4024/12 · Oct/Nov 2016 · Q153 Marks

Solve the simultaneous equations. 3x + y = 9 2x + 3y = -8

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2016). The mark or mark type is shown in brackets.

  1. [M1] A correct method to eliminate one variable
  2. [A1] Either x = 5 or y=-6 WWW
  3. [A1] Both x = 5 and y=-6 WWW
  4. If [0] earned, then award C1 for a pair of values that satisfy either equation.
  5. If only M1 earned, then award B1 for a correct substitution of their first solution into one, or a correct linear combination of both, of the original equations.

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About this question

Topic
Algebra and graphs, O-Level Mathematics (syllabus 4024). Structured question, 3 marks.
Source
O-Level Mathematics, Oct/Nov 2016 Paper 1 Variant 2, question 15.

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