Answer:
2 -1
1 1 system determinant or denominator determinant
0 -1
-3 1 x determinant
2 0
1 -3 y determinant
Explanation:
We are making a matrix of the coefficients of the variables.
The matrix goes
x1 y1
x2 y2
2 -1
1 1
system determinant
When we replace x with the constants, we get the x determinant
0 -1
-3 1
When we replace y with the constants, we get the y determinant
2 0
1 -3