
GRE Math Review 2 Algebra
... distinguishes algebra from arithmetic is that of a variable, which is a letter that represents a quantity whose value is unknown. The letters x and y are often used as variables, although any letter can be used. Variables enable you to present a word problem in terms of unknown quantities by using a ...
... distinguishes algebra from arithmetic is that of a variable, which is a letter that represents a quantity whose value is unknown. The letters x and y are often used as variables, although any letter can be used. Variables enable you to present a word problem in terms of unknown quantities by using a ...