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WAEC Mathematics 2006 Question 4

Question 4

Algebraic Expressions

Simplify: (x − 4)/4 − (x − 3)/6

  1. A.(x − 18)/12
  2. B.(x − 6)/12
  3. C.(x − 18)/24
  4. D.(x − 6)/24
Show the answer and explanation

Answer: B ((x − 6)/12)

Explanation

Use the common denominator 12: [3(x − 4) − 2(x − 3)]/12 = (3x − 12 − 2x + 6)/12 = (x − 6)/12.