-2x = 16 - x = -8, 2x = 16 - x = 8, x/4 = 9 - x = 36, 6x = 12 - x = 2, 20 = x/8  - x = 160, 3 = x/9 - x = 27, 8x = 400 - x = 50, -x/4 = 9 - x = -36, 6x=120 - x = 20, 8x = 40 - x = 5, 36/x = 3 - x = 12,

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