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**Reena has pens and pencils which together are 40 in number. If she has five more pencils and five less pens, then the number of pencils would become four times the number of pens. Find the original number of pens and pencils. Answer in detail.**

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by vidhimoon

If a= 16(238)15, b= 12(178)15 then x = 14(?)16...