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UI Post-UTME Mathematics 2012 Question 15

Question 15

Indices

Solve the simultaneous equation y = 3x; 3x−y = 1/81

  1. A.(1, 3)
  2. B.(2, 6)
  3. C.(3, 9)
  4. D.(4, 12)
Show the answer and explanation

Answer: B ((2, 6))

Explanation

x − y = −4 and y = 3x give x = 2, y = 6.