Find number abc
If 19a91 + 6b6cc = 8bb1a find number abc. Multiple solutions may exist.Correct answers: 62
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Envelope machineIn 1898, the first envelope folding and gumming machine recieved patent No. 598,716. John Ames Sherman of Worcester, Mass., had designed a "mechanism for folding and sealing envelopes, which reduced the manufacturing cost per thousand from 60 cents to 8 cents. |