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WAEC Mathematics 2013 Question 2

Question 2

Indices

If 9(2−x) = 3, find x.

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

Answer: B (3/2)

Explanation

32(2 − x) = 31, so 4 − 2x = 1 and x = 3/2.