X = 10 - X +2 = 12, X = 22 - X-2 = 20, X = 35 - X - 20 = 15, X = 9 - 15 = X+6, X = 45 - 30 = X-15, X = -22 - X+12 = -20, X= -20 - x + 30 =10, X=0 - x -15 = -15, X= 69 - 50 = x -19, X=22 - x -10 = 12, x=4 - x + 8 = 12, X= -23 - x + 3 = -20,

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