A variable is a letter or symbol used to represent a quantity that can change. Any letter can be used, but x and y are common. You may have seen variables used in formulas, like the area of a rectangle. To find the area of a rectangle, you multiply length times width, written using the two variables l and w.
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variable
A variable is a letter or symbol used to represent a quantity that can change. Any letter can be used, but x and y are common. You may have seen variables used in formulas, like the area of a rectangle. To find the area of a rectangle, you multiply length times width, written using the two variables l and w.
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Variable
A symbol that represents a quantity in an algebraic expression.
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