Equation, Matrix & Determinant

How to solve a equation like this in just 3 steps?
For example this equation
2x + y -3z = 5

3x - 2y -2z = 5

5x - y - 3 = 16

Find Determinant of Any size Matrix |A|
Find Transpose, Adjoint and Inverse of Any size Matrix
Find Eigen-value set of a Matrix
Add and Multiply Matrices of Any size

This is a non commercial, educational project. I always wanted this program,when I was in my Junior college,Linear Algebra class.

The size of computation is only limited by size of your cell phone's processor and RAM. Any size Matrix and Linear equation variables of any number of unknown variables.

Note: This application uses External SD Card permission to store your Matrix results in Text files and also to save your last computations.

Attribution:
Uses "Apache Commons Math: The Apache Commons Mathematics Library" used under Apache license https://commons.apache.org/proper/commons-math/
Apache License 2.0 can be found at http://www.apache.org/licenses/LICENSE-2.0