abc1 - 2889 = 1abc
abc x 10 + 1 - 2889 = 1000 + abc
abc x 10 - abc = 1000 + 2889 - 1
abc x (10-1) = 3888
abc = 3888 : 9
abc = 432
abc2 - 2abc = 5778
abc x 10 + 2 - 2000 + abc = 5778
abc x 10 - abc = 5778 + 2000 - 2
abc x 9 = 7776
abc = 7776 : 9
abc = 864
abc1-2889=1abc
=>abc.10+1-2889=1000+abc
=>abc.10-abc=1000+2889-1
abc.(10-1)=3888
abc.9=3888
abc=3888:9
abc=432
abc2-2abc=5778
=>abc.10+2-2000+abc=5778
<=>abc.10-abc=5778+2000-2
abc.(10-1)=7776
abc.9=7779
abc=7776:9
abc=864
a abc2-2abc=5778
abc*10+2-2000+abc=5778
abc*10-abc=5778+2000-2
abc*9=7776
abc=7776/9
abc=864
babc1-2889=1abc
abc*10+1-2889=1000+abc
abc*10-abc=1000+2889-1
abc*9=3888
abc=3888/9
abc=432
abc1-2889=1abc
=>abc.10+1-2889=1000+abc
=>abc.10-abc=1000+2889-1
abc.(10-1)=3888
abc.9=3888
abc=3888:9
abc=432
abc2-2abc=5778
=>abc.10+2-2000+abc=5778
<=>abc.10-abc=5778+2000-2
abc.(10-1)=7776
abc.9=7779
abc=7776:9
abc=864
