Each of the matrices in Problems 49-54 is the final matrix form for a system of two linear equations in the variables x1 and X2. Write the solution of the system. in 10 - 31 in O O - N O O 15 B Solve Problems 55-74 using augmented matrix methods. 15. x1 - 2x2 = 1 56. * + 3x2 = 1 2x1 - x2 = 5 3x1 - 2x2 = 14 57. x1 - 4x2 = -2 58. x1 - 3x2 = -5 -2x1+ x2 = -3 -3x1 - X2 = 5 59. 3x1 - x2 = 2 60. 21+ 12 = O *1 + 2x, = 10 *1 - 2x2 = -5 61. * + 2x2 = 62. 2x1 - 3x2 = -2