# Beginning Operations Exercises

### Example 1

Create a coefficient matrix:

3*x* + *y* = 0

-*x* – 5*y* = 4

### Example 2

Create a coefficient matrix:

3*x* – 4*y* = -7*x* + *y* = 9

### Example 3

Create a coefficient matrix:

2*x* + 2*y* = 11

6*x* – *y* = 3

### Example 4

Find the determinant:

### Example 5

Find the determinant:

### Example 6

Find the determinant: