Find number abc
If c79c3 - baabb = 9bbc find number abc. Multiple solutions may exist.Correct answers: 30
The first user who solved this task is Nílton Corrêa de Sousa.
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Brake patentIn 1828, the first U.S. patent for a brake of any kind was issued to Robert Turner of Ward (now Auburn), Mass. This was for a "self-regulating wagon brake." |