X+y=3 x-y=1 find the find the determinants

Step-by-step explanation:

System Determinant

The determinant of the system is the determinant of the matrix of coefficients:

X Determinant

This is the determinant of the matrix with the x-coefficients replaced by the constants.

Y Determinant

This is the determinant of the matrix with the y-coefficients replaced by the constants.

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This problem didn't ask, but the solution is ...

  x = Dx/D = -4/-2 = 2

  y = Dy/D = -2/-2 = 1

  (x, y) = (2, 1)

answer: (1,3) and (-2,0) i think.