140-[(24:x+12x13):4+353]:3-6=3
140-[(24:x+12x13):4+353]:3=3+6
140-[(24:x+12x13):4+353]:3=9
[(24:x+12x13):4+353]:3=140-9
[(24:x+12x13):4+353]:3=131
(24:x+12x13):4+353=131x3
(24:x+12x13):4+353=393
(24:x+12x13):4=393-353
(24:x+12x13):4=40
(24:x+12x13)=40x4
24:x+12x13=160
24:x+156=160
24:x=160-156
24:x=4
x=24:4
x=6
{49.900-[38.000-72.040:(904-x)]x25}x8=3.200
{49.900-[38.000-72.040:(904-x)]x25}=3.200:8
49.900-[38.000-72.040:(904-x)]x25=400
[38.000-72.040:(904-x)]x25=49900-400
[38.000-72.040:(904-x)]x25=49500
38.000-72.040:(904-x)=49500:25
38.000-72.040:(904-x)=1980
72.040:(904-x)=38000-1980
72.040:(904-x)=36020
904-x=72040:36020
904-x=2
x=904-2
x=902
