# Matrices

# Cramer's Rule Redux Exercises

### Example 1

Express these equations as matrices:

2*x* – 3*y* + 5*z* = 9

3*x* + *y* – 4*z* = 7

-*x* + 6*y* + *z* = 6

### Example 2

Now find *D* for the following.

Express these equations as matrices:

2*x* – 3*y* + 5*z* = 9

3*x* + *y* – 4*z* = 7

-*x* + 6*y* + *z* = 6

Now find *D* for the following.