Find parametrizations for the lines in which the planes in Exercises 61–64 intersect.
61. x + y + z = 1, x + y = 2
62. 3x - 6y - 2z = 3, 2x + y - 2z = 2
63. x - 2y + 4z = 2, x + y - 2z = 5
64. 5x - 2y = 11, 4y - 5z =-17
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