1-x=1\5x=1-1\5x=1\41-1\4=1\5
x+2\7=1x=1-2\7x=5\75\7+2\7=1
1-x=4\7 x=1-4\7x=3\71-3\7=4\7
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Х=-0,8
Х=1-2/7
х=5/7
1-х=4/7
Х=1-4/7
Х=3/7
1-x=1\5
x=1-1\5
x=1\4
1-1\4=1\5
x+2\7=1
x=1-2\7
x=5\7
5\7+2\7=1
1-x=4\7
x=1-4\7
x=3\7
1-3\7=4\7