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JAMB Mathematics 2002 Question 22

Question 22

Linear and Simultaneous Equations

If −2 is the solution of the equation 2x + 1 − 3c = 2c + 3x − 7, find the value of c.

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

Answer: C (2)

Explanation

Put x = −2: −4 + 1 − 3c = 2c − 6 − 7, so −3 − 3c = 2c − 13. Then 10 = 5c and c = 2.