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A letter that represents a number

Variable expression

An expression containing operations with variables with the same point


Parts of an expression separated by a+ or - sign.


A term that is a number


a number that multiplies a variable

like terms

numbers or terms that have the same exponent.

combine like terms

add or subtract the coefficients of the variables

simplify a variable expression

combine like terms


replace a variable with a number

evaluate a variable expression

find the value by substituting numbers for the variables.


the number of cubes needed to fill a space

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