System of EquationsBabylonians solve system of equations.
Quadratic EquationEgyptians solve the quadratic equation.
Algebraic EquationsChinese solve algebraic equations.
Cubic EquationsDel Ferro was the first to solve the cubic and quartic equations. Multiple roots and complex numbers were introduced for the first time.
Step by Step EquationsThe first step by step algebra problems were published in A Treatise of Algebra by William Emerson.