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WAEC Mathematics 2007 Question 9

Question 9

Linear and Simultaneous Equations

I am x years old and my brother is 3 years older. How old was my brother last year?

  1. A.(x − 4) years
  2. B.(x + 2) years
  3. C.(3x − 1) years
  4. D.(3x + 1) years
Show the answer and explanation

Answer: B ((x + 2) years)

Explanation

The brother is now x + 3, so last year he was x + 3 − 1 = x + 2.