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Mathematics, 25.03.2020 02:05 Eylul30

A student bought twice as many 10 βˆ’ cent pens as 15 βˆ’ cent pens. He also bought as many 20 βˆ’ cent pens as both of the other two combined. How many of each kind did he get if he paid a total of 190 cents.

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A student bought twice as many 10 βˆ’ cent pens as 15 βˆ’ cent pens. He also bought as many 20 βˆ’ cent pe...
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