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WAEC Further Mathematics 2020 Question 10

Question 10

Polynomials

Given that 2x + 3y − 10 = 0 and 3x = 2y − 11, calculate the value of (x − y).

  1. A.5
  2. B.3
  3. C.−3
  4. D.−5
Show the answer and explanation

Answer: D (−5)

Explanation

Solving 2x + 3y = 10 and 3x − 2y = −11 gives x = −1, y = 4, so x − y = −5.