x = 5 - x + 12 = 17, x = 20 - 2x = 40, x = 6 - 3x = 18, x = 8 - x - 4 = 4, x = 7 - 6x = 42, x = 10 - 45x = 450, x = 3 - 4x = 12, x = 0 - 7x = 0, x = 18 - x + 4 = 22, x = 30 - x - 15 = 15, x = 19 - x - 7 = 12, x = 2 - 12x = 24, x = 100 - x - 25 = 75, x = 11 - x - 5 = 6, x = 9 - x + 7 = 16, x = 45 - x + 7 = 52, x = 15 - x - 6 = 9, x = 103 - x - 13 = 90, x = -4 - x + 14 = 10, x = 1 - x + 25 = 26,

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