Write a program to read cost of 10 pens and find the cost of 5 pens

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1. Answer:

   Given total cost of 5 pens and 10 pencil = Rs 30

   5 pens + 10 pencils = 30

   pens + 2 pencils = 1

   also given pen cost 3 more than a pencil

   i.e, pen = 3 + pencil.

   pen – pencil = 3

   pens + 2 pencils = 6

   _______________

   -3 pencils = -3

   pencils = 1

   pen – 1 = 3

   pen = 4

   cost of pencils = 1 cost of pen = 4

   Step-by-step explanation:

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