What is the equation of the line midnight between the lines

What is the equation of the line midnight between the lines 3x – 4y + 12 and 3x – 4y = 6 ?

  1.  3x -4y – 9 = 0
  2.  3x -4y + 9 = 0
  3. 3x – 4y – 3 = 0
  4. 3x – 4y + 3 = 0
Anurag Mishra Professor Asked on 17th March 2016 in Maths.
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