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WAEC Mathematics 1997 Question 7

Question 7

Linear and Simultaneous Equations

Solve the equation: 2/3 (x + 5) = 1/4(5x − 3)

  1. A.1 1/7
  2. B.1 8/23
  3. C.3
  4. D.4 3/7
  5. E.7
Show the answer and explanation

Answer: E (7)

Explanation

Multiply both sides by 12: 8(x + 5) = 3(5x − 3), so 8x + 40 = 15x − 9, giving 7x = 49 and x = 7.