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Cena kwiatka - 2,50 (zł)
Cena przybrania - x
2,50 * 3 + x = 12
7,50 + x = 12 /-7,50
x = 4,50 (zł)
Spr. 4,50 + 3 * 2, 50 = 12 (zł)
Odp. Cena przybrania wynosi 4, 50 (zł)