Solve using augmented matrix methods. 2x1 - X2 = 5 X1 + 5X2 = 19 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. The unique solution is x, = and X, = O A. (Simplify your answers.) The system has infinitely many solutions. The solution is X, = and X, = t. O B. (Simplify your answer. Type an expression using t as the variable.) O c. There is no solution