Traditional Culture Encyclopedia - Almanac inquiry - Henan stationery counter calendar
Henan stationery counter calendar
The ratio of pencil to pen is 5:4.
If 7 pencils match 7/5*4=28/5 pens, it's a perfect match.
therefore
Number of collocation groups = 36(28/5-2)= 10 groups.
Pencils =7* 10=70.
Pen =2* 10+36=56。
If you need an equation solution or something like that, please ask.
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