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WAEC Mathematics 2004 Question 16

Question 16

Algebraic Expressions

If x/(a + 1) + y/b = 1. Make y the subject of the relation

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

Answer: A (b(a + 1 − x)/(a + 1))

Explanation

y/b = 1 − x/(a + 1) = (a + 1 − x)/(a + 1), so y = b(a + 1 − x)/(a + 1).