х-7 14/19=15 24/19-10 13/19
х-7 14/19=5 11/19
х=5 11/19+7 14/19
х=12 25/19
х=13 6/19
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х-7 14/19=15 24/19-10 13/19
х-7 14/19=5 11/19
х=5 11/19+7 14/19
х=12 25/19
х=13 6/19