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Unilorin Post-UTME Mathematics 2015 (Model questions) Question 24

Question 24

Linear and Simultaneous Equations

Ade would be x years old y years to this time. How old was he z years ago?

  1. A.x + y − z
  2. B.x + y + z
  3. C.x − z − y
  4. D.x − y − z
Show the answer and explanation

Answer: D (x − y − z)

Explanation

He is now x − y years old, so z years ago he was x − y − z.