36)

Step 1:

The system of equations are

Solve by using matrices.

Write the equations into matrix form ,

Write the equations into matrix form , where is coefficient matrix,

is variable matrix and is constant matrix.

The augmented matrix is .

The augmented matrix is

Solution:

The solutions of equations are

37)

Step 1:

The system of equations are

Solve by using matrices.

Write the equations into matrix form ,

Write the equations into matrix form , where is coefficient matrix,

is variable matrix and is constant matrix.

The augmented matrix is .

The augmented matrix is

Solution:

The solutions of equations are

41)

Step 1:

The system of equations are

Solve by using matrices.

Write the equations into matrix form ,

Write the equations into matrix form , where is coefficient matrix,

is variable matrix and is constant matrix.

The augmented matrix is .

The augmented matrix is

Solution:

The solutions of the equations are

42)

This question first option is correct answer.