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1. যদি x+y+4 = x-y-12 = 0 হয়, তবে 2x+y = কত?

  • A. 4
  • B. 4
  • C. 4
  • D. 4

Answer: Option D

Explanation:

Correct Answer: Option D

 x+y+4 = x - y - 12 = 0 

অর্থাৎ , x + y + 4 = 0 

   বা,  x + y = -4 ....(i) 

 এবং x - y = 12 ......(ii) 

     (i) ও (ii) যোগ করে, 

      2x = 8 

       x = 4 

  (i) নং-এ x-এর মান বসিয়ে- 

      4 + y = -4 

বা, y = -4 -4 

     y = -8 

 এখন, 2x + y = 2 x 4 + (-8) = 8 - 8 = 0  


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