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Tier 10.7 h to studyHigh confidenceEasyabout 1.8 questions2.4% of marks

A8 — Linear equations: ages, heads-and-legs, two-variable systems

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  • 2. Exactly what gets asked
  • 3. Concept notes
  • 4. Must-memorise block
  • 5. Worked examples
  • 6. Traps and gotchas
  • 7. Practice questions
  • 8. Resources
  • 9. Self-check
  • 10. Sources