4 5/14-(х-7 3/14)=2 9/14
х-7 3/14=4 5/14-2 9/14
х-7 3/14=3 19/14-2 9/14
х-7 3/14=1 10/14
х=1 10/14+7 3/14
х=8 13/14
4 5/14-(х-7 3/14)=2 9/14
х-7 3/14=4 5/14-2 9/14
х-7 3/14=3 19/14-2 9/14
х-7 3/14=1 10/14
х=1 10/14+7 3/14
х=8 13/14