Question

Choose the best definition for the following term: variable

Answer 1

A letter that holds the place for some unknown value in mathematics.

A process where you must look for terms that have identical variable parts and then combine their coefficients.

A process where if two things are equal, one can be put in the place of the other and nothing will change.

Terms that have identical variable parts.

Answer 2

Terms that have identical variable parts.

Answer 3

I like the first definition best myself, but I don't love any of these definitions.