The calculator solves systems of linear equations with two and three variables. • System solver 2x2 Solves systems of two linear equations in two variables by substitution or using using Cramer's rule. • System solver 3x3 Solves systems of three linear equations in three variables using Cramer's Rule. To solve 3x3 systems of equations, you should select a landscape orientation. Features: Shows step-by-step solution. Supports integer, fractional and decimal coefficients. Shows results as decimals and fractions. Stores history with the possibility to recall previous equations. Sends results and history via email. Supports both portrait and landscape orientation.