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Calculati numarul necunoscut:
98459+65137-c=79813
132207+e+214862=468989


Răspuns :

 98459+65137-c=79813
 c=98459+65137
 c=163596
 c=163596-79813
 c=83783
 v:163596-83783=79813

132207+e+214862=468989
e=214862-132207
e=83783
e=132207+83783
e=215990
v:215990+214862=468989
sper ca team ajutat!