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WAEC Mathematics 2001 Question 23

Question 23

Algebraic Expressions

Subtract (−y + 3x + 5z) from (4y − x − 2z).

  1. A.5y − 4x − 7z
  2. B.3y + 2x + 3z
  3. C.−5y + 4x + 7z
  4. D.2x − 5y + 3z
Show the answer and explanation

Answer: A (5y − 4x − 7z)

Explanation

(4y − x − 2z) − (−y + 3x + 5z) = 4y + y − x − 3x − 2z − 5z = 5y − 4x − 7z.