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4 years, 10 months ago
cost of 8 pencils 5 pens and 3 erasers is rs 111 cost of 9 pencils , 6 pens and 5 erasers is rs 130 cost of 16 pencils 11 pens and 3 erasers is rs 221 what is the cost (in rs) of 39 pencils 26 pens and 13 erasers?