Editing Theory of equations (section)

==Further problems==
Other classical problems of the theory of equations are the following:
* [[Linear equation]]s: this problem was solved during antiquity.
* [[System of linear equations|Simultaneous linear equations]]: The general theoretical solution was provided by [[Gabriel Cramer]] in 1750. However devising efficient methods ([[algorithms]]) to solve these systems remains an active subject of research now called [[linear algebra]].
* Finding the integer solutions of an equation or of a system of equations. These problems are now called [[Diophantine equation]]s, which are considered a part of [[number theory]] (see also [[integer programming]]).
* [[System of polynomial equations|Systems of polynomial equations]]: Because of their difficulty, these systems, with few exceptions, have been studied only since the second part of the 19th century. They have led to the development of [[algebraic geometry]].