Find number abc
If ac5a1 + b52c9 = 155b9c find number abc. Multiple solutions may exist.Correct answers: 40
The first user who solved this task is Djordje Timotijevic.
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Brass spinning patentIn 1851, the first U.S. patent for brass spinning was issued to H.W. Hayden in Waterbury, Connecticut (No. 8589). His invention was for machinery that could make kettles and similar articles from discs of metal. A disc was mounted in a chuck that rotated at a uniform speed. A tool then pressed against the metal and shaped it to a die. |