The answer is C! 6/7 because the negatives cancel out!
Answer:
$120
Step-by-step explanation:
150-20%
For some reason it says that my response has to be 20 characters long that's why I'm typing this.
The augmented matrix is,

We have given system of linear equation is,

<h3>What is the meaning of augmented matrix?</h3>
In an augmented matrix, each row represents one equation in the system and each column represents coefficients (with signs) of variables or the constant terms.
So, the first row is

the second row is

and the third row is

Therefore the augmented matrix for this linear system is,

To learn more about the augmented matrix visit:
brainly.com/question/14600951