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Aflati numarul necunoscut:
140-[(24:x+12×13):4+353]:3-6=3


Răspuns :

140-[(24:x+156):4+353]:3-6=3
[(24:x+156):4+353]:3-6=137
[(24:x+156):4+353]:3=143
(24:x+156):4+353=42
(24:x+156):4=-311
24:x+156=-1244
24:x=-1400
x=-24\1400
x=-3\175