Pronunciation: /ˈsʌb.stɪˌtjut/ Explain

To substitute is to replace a variable or expression with another variable or expression that may be equal to the original variable or expression. For example, start with the equation y = x + 4. Substitute -3 for x. This gives y = -3 + 4. Now simplify the equation, giving y = 1. One can the conclude that when x = -3, y = 1 and that (-3, 1) is a solution to the original equation y = x + 4.


  1. McAdams, David E.. All Math Words Dictionary, substitute. 2nd Classroom edition 20150108-4799968. pg 172. Life is a Story Problem LLC. January 8, 2015. Buy the book

More Information

  • McAdams, David E.. Substitution Property of Equality. All Math Words Encyclopedia. Life is a Story Problem LLC. 3/12/2009.

Cite this article as:

McAdams, David E. Substitute. 5/7/2019. All Math Words Encyclopedia. Life is a Story Problem LLC.

Revision History

5/7/2019: Changed equations and expressions to new format. (McAdams, David E.)
12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
12/10/2018: Removed broken links, updated license, implemented new markup. (McAdams, David E.)
8/7/2018: Changed vocabulary links to WORDLINK format. (McAdams, David E.)
11/25/2008: Initial version. (McAdams, David E.)

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