January 2019 2 13 Report
Sześciu robotników wyremontowali sklep w ciągu 12 dni.Ile robotników trzeba zatrudnić -aby remont trwał 9 dni?
Tu mam zaczęte :

Robotnicy 6 x
Dni 12 9
6 x 12 = 9x
....
Daje naj!

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