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Find number abc

If 3b7b6 - 19a3a = 11c7c find number abc. Multiple solutions may exist.

Correct answers: 39

The first user who solved this task is Djordje Timotijevic.

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Edison car starter patent

In 1918, Thomas A. Edison was issued a U.S. patent for a "Starting and Current-Supplying System for Automobiles" (No. 1,255,517).

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