(х+2 9/11)=1 4/11+4 10/11
х +2 9/11= 5 14/11
х= 5 14/11- 2 9/11
х= 3 5/11
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Проверка :
( 3 5/11+2 9/11)- 4 10/11=1 4/11
5 14/11 - 4 10/11= 1 4/11
1 4/11= 1 4/11
(х-1 8/9)= 4 4/9-3 7/9
х-1 8/9= 40/9-34/9
х-1 8/9= 6/9
х= 6/9+1 8/9
х= 1 14/9=2 5/9
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Проверка:
(2 5/9-1 8/9)+3 7/9= 4 4/9
(1 14/9-1 8/9)+3 7/9= 4 4/9
6/9+3 7/9= 4 4/9
3 13/9= 4 4/9
4 4/9=4 4/9