Siri bought 2 notebooks and 3 pens for Rs 90 . Lakshmi bought
4 notebooks and 5 pens for Rs 140. Form linear equations for the given
situation to find the cost of a pen and a notebook .
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he 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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