Frae Wikipedia, the free beuk o knawledge
The first use o an equals sign, equivalent tae 14x + 15 = 71 in modren notation. Frae The Whetstane o Witte bi Robert Recorde (1557).

In mathematics, an equation is an equality containin ane or mair variables. Solvin the equation consists o determinin which values o the variables mak the equality true.

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