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DavidB4-bot

clean up & uniformity

Aschlafly

Reverted edits by 4channerswillwin (Talk) to last revision by Aschlafly

4channerswillwin

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Aschlafly

Reverted edits by MarieYu (Talk) to last revision by Wuhao1911

MarieYu

Redirected page to Hijra

Wuhao1911

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WesleyS

add ref, remove uncited tag

Hsmom

Stub, citations missing.

Greenmeanie

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Rellik

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Rellik

what one does not know.

Lukecorlando

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Fantomas

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Jallen

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Joaquín Martínez

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DrSandstone

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Fantomas

no edit summary

Fantomas

New page: In mathematics, when a letter is used to represent a number or set of numbers it is called an unknown. This letter usually has a very specific range of values, unlike a variable which...