Consider the following system of equations. X1-X2 + 3x3 - 3 2x1 + x2 + 2x3 = 4 -2x1-2x2 + x3 = 1 (a) Write a matrix equation that is equivalent to the system of linear equations. X1 2 2 -2 -2 X3 (b) Solve the system using the inverse of the coefficient matrix. (X1, x2, x3) = ( 3, 4, 1