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如果 x=y,那么 x﹣2=y﹣2 如果﹣x=8,那么 x=﹣4 如果 mx=my,那么 x=y 如果|x|=|y|,那么 x=y
8,2,3,4,5,6,7,1, 5,6,7,8,1,2,3,4, 1,2,3,4,5,6,7,8, 8,7,6,5,4,3,2,1
8,2,3,4,5,6,7,1, 5,6,7,8,1,2,3,4, 1,2,3,4,5,6,7,8, 8,7,6,5,4,3,2,1,
8,2,3,4,5,6,7,1 5,6,7,8,1,2,3,4 1,2,3,4,5,6,7,8 8,7,6,5,4,3,2,1
(x-5y+1)(x-5y-8) (x-5y+4)(x-5y-2) (x-5y-4)(x-5y-2) (x-5y-4)(x-5y+2)
8,2,3,4,5,6,7,1, 5,6,7,8,1,2,3,4, 1,2,3,4,5,6,7,8, 8,7,6,5,4,3,2,1,
4, 3, 7 3, 4, 7 5, 2, 7 2, 5, 7
如果2x=2y+1,那么x=y+1 如果2=5+3x,那么3x=5﹣2 如果x﹣3=y﹣3,那么x=y 如果﹣8x=4,那么x=﹣2
8,2,3,4,5,6,7,1, 5,6,7,8,1,2,3,4, 1,2,3,4,5,6,7,8, 8,7,6,5,4,3,2,1,
2 3 4 5 2 3 4 3 4 5 4 5 2 3 2 3
8,2,3,4,5,6,7,1 5,6,7,8,1,2,3,4 1,2,3,4,5,6,7,8 8,7,6,5,4,3,2,1