Equation ○꠹｜appendage｜___｜20260628155835-01-•

The first use of an equals sign, equivalent to 14 x + 15 = 71 in modern notation. From The Whetstone of Witte by Robert Recorde of Wales (1557).¹

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Footnotes

1. Recorde, Robert, The Whetstone of Witte… (London, England: Jhon Kyngstone, 1557), the third page of the chapter “The rule of equation, commonly called Algebers Rule.” ↩