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JAMB Mathematics 2011 Question 15

Question 15

Linear and Simultaneous Equations

Solve for x and y respectively in the simultaneous equations −2x − 5y = 3, x + 3y = 0

  1. A.−3, −9
  2. B.9, −3
  3. C.−9, 3
  4. D.3, −9
Show the answer and explanation

Answer: C (−9, 3)

Explanation

x = −3y. Then 6y − 5y = 3, so y = 3 and x = −9.