Solve this system of equations using the inverse of a matrix.
-x+y=8
4x+3y=12
x-7y+z=15

[Hint: AX=B and X=BA⁻¹]
A. x=4, y=68 and z=5.39
B. x=68, y=5.39 and z=4
C. x=-1.76, y=6.24 and z=60.76
D. x=6.24, y=-1.76 and z=60.76
E. x=72, y=-4 and z=12.78