Someone I don't like! Just kidding. Algebra really was not ever invented by one person. It is a type of reasoning that has been used through the whole humans existence.

Algebra was not made by anyone in particular. It has developed over 4000 years. The history of Algebra is broken down into different eras in history. You can find more information here: http://www.ucs.louisiana.edu/~sxw8045/hi...