Final answer:
The subject related to the given question is Simultaneous Equations in Mathematics. A system of linear equations consists of two or more linear equations with the same variables, which can be solved using various methods.
Step-by-step explanation:
In mathematics, the subject related to the given question is Simultaneous Equations. Simultaneous equations are a set of equations with multiple variables that are solved together to find the values of those variables.
In this case, the student is looking for a calculator for solving systems of linear equations. A system of linear equations consists of two or more linear equations with the same variables.
There are various methods to solve systems of linear equations, such as substitution, elimination, and matrix methods.