Use the inverse of the coefficient matrix to solve the system of equations. x + 2y + 3z = 15 2x + 3y + 4z = -4 -X - 4y - 8z = -75 Identify the inverse of the coefficient matrix. (Type an integer or simplified fraction for each matrix element.) Solve the system. (x,y,z) = (WD (Type integers or simplified fractions.)(EnA) UB' A Use the graphing tool to shade the set. Click to enlarge graph B