Solve the System Using the Inverse of the Coefficient Matrix

Multiple Choice

Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation.
-0.3x - 0.4y - 0.1z = 9 -0.5x + 0.6y + 0.1z = -13
0.1x + 0.3y - 0.2z = 2

A) {(-10, 10, -20) }
B)
C) {(10, -10, -20) }
D) {(0, 0, 0) }