Find number abc
If 7cb06 + 69ac0 = 1a29c6 find number abc. Multiple solutions may exist.Correct answers: 1
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Leather tanningIn 1884, the first U.S. patents for tanning hides and skins through the action of a metallic salt were issued to Augustus Schultz of New York City. His invention of a chrome tanning process enabled leather to be tanned thinner and stronger than by vegetable tanning. (Nos. 291,784 and -5) |