Find number abc
If 568ba - b893c = 79aa find number abc. Multiple solutions may exist.Correct answers: 68
The first user who solved this task is Roxana zavari.
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Magic lantern slidesIn 1850, the first U.S. patent for magic lantern slides made of glass plate was issued to their inventor Frederick Langenheim of Philadelphia, Pa. (No. 7,784) as an "improvement in photographic pictures on glass." |