What is algebra and who invented it?
Algebra is the study of variables and the rules for manipulating these variables in formulas.
 The word algebra(in Arabic al-jabr) comes from the title of the early 9th century book ��Ilm al-jabr wa l-muq��bala "The Science of Restoring and Balancing" by the Persian mathematician and astronomer al-Khwarizmi. He used the term al-jabr for the operation of moving a term from one side of an equation to the other.
 here is a basic algebra equation:
 2 + x = 4
 by moving 2 to the other side of the equation we will have:
 x = 4 - 2
 x = 2