Question

Choose the best definition for the following term: substitution

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 1

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

Explanation:

Well in all honesty subbing has many definitions depending on what it's used for so in what way are you implying that subbing is used for?

Answer 2

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

Explanation:

Its like replacing :)