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The cost of 2 books, 6 notebooks and 3 p...

The cost of 2 books, 6 notebooks and 3 pens is Rs. 40. The cost of 3 books, 4 notebooks and 2 pens is Rs. 35 , while the cost of 5 books, 7 notebooks and 4 pens is Rs. 61. Using these informations and matrix , find the cost of one book , one notebook and one pen separately .

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