Answer:
x = 1.55
y = 1.86
Step-by-step explanation:
Determinant of the original matrices;
Do = -3(4) -9(6)
Do = -12 - 54
Do = -66
For Dx
Replace the answer in the first column and fine the determinant
Dy = 17(-3) - 8(9)
Dy = -51-72
Dy = -123
y = Dy/Do
y = -123/-66
y = 1.86
Get Dx
Dx = 4 (-8) - 17(6)
Dx = -32-102
Dx = -134
x = Dx/Do
x = -132/-66
x = 1.55
