b is the correct answer
Step-by-step explanation:
see the step in the picture
(c + 3) - 2c - (1 - 3c) = 2 what is this answer to this problem?
1 answer:
You might be interested in
The coefficient matrix is build with its rows representing each equation, and its columns representing each variable.
So, you may write the matrix as
which means
The determinant is computed subtracting diagonals:
So, we have