3 4/9-(x-1 7/9)=2 2/9

 3 4/9-(х-1 7/9)=2 2/9 х-1 7/9=3 4/9-2 2/9 х-1 7/9=1 2/9 х=1 2/9+1 7/9 х=2 9/9 х=3

3 4/9-(х-1 7/9)=2 2/9 х-1 7/9=3 4/9-2 2/9 х-1 7/9=1 2/9 х=1 2/9+1 7/9 х=3