Find number abc
If c71bc + 2b844 = b4aa7 find number abc. Multiple solutions may exist.Correct answers: 20
The first user who solved this task is Nasrin 24 T.
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First U.S. railroad using the telephoneIn 1877, a trial test of a telephone was given in the Pennsylvania Railroad Company shops by associates of Alexander Graham Bell. The company was impressed by the demonstration and became the first to make a permanent installation.«* |