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Find number abc

If a5baa - a33b5 = ac77 find number abc. Multiple solutions may exist.

Correct answers: 80

The first user who solved this task is Roxana zavari.

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Children's carriage patent

In 1889, black American inventor W.H. Richardson was issued two patents for a "Child's Carriage" (U.S. Nos. 405,599 - 600) In 1886, he had already also patented a "Cotton Chopper".

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