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8/15һ(8/15һ7/18)

8/15һ(8/15һ7/18) =8/15-8/15+7/18 =7/18

8/15>2/5 6/181/6 1/57/10 3/45/6

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ҹ 1,3,7,15,31,63. 8,15,18,13,12,11,22,9.

Լֺ Ӧÿ3/83 13/94/155/755/32/52/3 СУ 25/5>18/6>12/3>13/9>5/7>2/3>4/10>3/8>4/15

x+4/9=3/5 X=3/5-4/9 X=7/45 9/10-x=3/5 X=9/10+3/5 X=15/10 x+7/18=5/9 X=5/9-7/18 X=1/6 7/16+x=5/24 X=5/24-7/16 X=-11/24 x-(4/7-1/3)=19/21 X-5/21=19/21 X=5/21+19/21 X=8/7 8/15+x=5/6 X=5/6-8/15 X=3/10

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