# What is the purpose of Cramer's rule?

##### 1 Answer

Oct 4, 2015

It is useful when you just want to find the value of 1 unknown in a system of linear equations without needing to find all the unknowns.

#### Explanation:

To find just 1 unknown in a system of linear equations you need to find only 2 matrix determinant values and then use Cramer's Rule