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OpenStudy (anonymous):
Why did they choose x for unknown?
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OpenStudy (anonymous):
x is an arbitrary variable in an elementary equation such as: y = 2x u or any other variable could be used in place of x, but consistency is key! y = 2u
OpenStudy (anonymous):
guess this might help... http://www.lifeslittlemysteries.com/1587-x-represents-unknown-quantity-variable.html
OpenStudy (anonymous):
It is because when Algebra was discovered, it was discovered by Muhammad ibn Mūsā al-Khwārizmī and Arab Mathematician in the 7 th Century. When X is translated into Arabic it means "thing". Thus when algebra spread to the Western World, the Arabic word of "thing" was translated into what we know today as "X".
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