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4024/11 May/Jun 2020, Question 16: Solving Linear Equations

Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 4 marks

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The question, in short

Solve a linear equation for x, then find the integer values satisfying a double inequality in 3x.

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Part (a) · 2 marks

Solve 5 − 2x = 12 for x.

  1. 1−2x = 12 − 5
  2. 2−2x = 7
  3. 3x = 7 ÷ (−2) = −3.5

Answer−3.5

Part (b) · 2 marks

Find all integers satisfying −5 ≤ 3x ≤ 6.

  1. 1−5/3 ≤ x ≤ 6/3
  2. 2−1 2/3 ≤ x ≤ 2
  3. 3Integers: −1, 0, 1, 2

Answer−1, 0, 1, 2

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