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O-LevelMathematicsAlgebra and graphs4024/11 · May/June 2020 · Q164 Marks

Solve the equation 5-2x = 12.

  1. (a)Solve the equation 5-2x = 12.[2]
  2. (b)Find the integers that satisfy -5 ≤ 3x ≤ 6.[2]

Mark scheme

Marking points from the official mark scheme (May/June 2020). The mark or mark type is shown in brackets.

  1. [2] -3.5 oe
  2. [2] M1 for -2x = 12-5
  3. [2] -1, 0, 1, 2
  4. [2] B1 for 3 integers correct and no extras or 4 correct with one extra
  5. [2] or M1 for -5/3 ≤ x ≤ 6/3

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About this question

Topic
Algebra and graphs, O-Level Mathematics (syllabus 4024). Structured question, 4 marks.
Source
O-Level Mathematics, May/June 2020 Paper 1 Variant 1, question 16.

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