Letters are the variables that represent the unknown ex- x-4 = 3 you have to find out what then letter is based on the information given So as you probably figured out x=7 i hope I hath made this easier
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That is called "algebra".That is called "algebra".That is called "algebra".That is called "algebra".
all the letters in the alphabet are used to represent variables in algebra. also in some advanced mathematics letters from the greek alphabet are used.
ertiohsreyhtsdrogh;drotygritnehr
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Some sequences are defined by rules and algebra is a mathematical way of describing rules.