Question

System of Linear Equations In Exercises 37-56, solve the system of linear equations. 37. x_1 - x_2 = 0 3x_1 - 2x_2 = -1 38. 3x + 2y = 2 6x + 4y = 14 39. 2u + v = 120 u + 2v = 120 40. x_1 - 2x_2 = 0 6x_1 + 2x_2 = 0 41. 9x - 3y = -1 1/5 x + 2/5 y = - 1/3 42. 2/3 x_1 + 1/6 x_2 = 0 43. x - 2/4 + y - 1/3 = 2 x - 3y = 20 44. x_1 + 4/3 + x_2 + 1/2 = 1 45. 0.02x_1 - 0.05x_2 = -0.19 0.03x_1 + 0.04x_2 = 0.52 46. 0.05x_1 - 0.03x_2 = 0.21 0.07x_1 + 0.02x_2 = 0.17 47. x + y + z = 6 2x - y + z = 3 3x - z = 0 48. x + y + z = 2 -x + 3y + 2z = 8 4x + y = 4 3x_1 - 2x_2 + 4x_3 = 1 x_1 + x_2 - 2x_3 = 3 2x_1 - 3x_2 + 6x_3 = 8 5x_1 - 3x_2 + 2x_3 = 3 2x_1 + 4x_2 - x_2 = 7 x_1 - 11x_2 + 4x_3 = 3