Find number abc
If 97b0c - 2a612 = 6aa92 find number abc. Multiple solutions may exist.Correct answers: 54
The first user who solved this task is Eugenio G. F. de Kereki.
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Shutter patentIn 1883, black American inventor J. Cooper was issued a patent for his invention, "Shutter and Fastening" (No. 276,563). In the next few years, he also patented elevator devices. |