Marcela down loadede some programs represented.

Let represented by programe on her portable media is sitcom, talkshows and movies.

The system of equations are  

Write the equations into matrix form ,

Where is coefficient matrix, is variable matrix and is constant matrix.

Definition of inverse matrix :

If is an then , where . 

Let , then .

, then has an inverse.

Cofactor of  is

Cofactor of

.

Find .

.

The inverse of the is

.

Rewrite the equation.

Find .

.

Marcela downloaded Sitcom , Talk shows and Movies .

Marcela downloaded sitcom, Talk shows and Movies.