Solve the system of equations using augmented matrix methods. Xq - 4X2 = - 2 4X9 - X2 = 7 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The unique solution to the system is x1 = and X2 = (Simplify your answers.) O B. There are infinitely many solutions. The solution is x, = and X2 = t, for any real number t. (Type an expression using t as the variable.) O C. There is no solution