(4 1/9-а)+8 5/9=9 2/9
4 1/9-а=9 2/9-8 5/9 4 1/9-а=6/9 а=4 1/9-6/9 а=3 4/9 (4 1/9-3 4/9)+8 5/9=6/9+8 5/9=8 11/9=9 2/9