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La o inteprindere agricola sunt 1000 de pasari, rate,gaini si curci,rate si gaini sunt902 iar curci si gaini 623.Cate pasari sunt ? Dau coroana !


Răspuns :

r+g+c=1000
r+g=902
c+g=623
902+c=1000
c=98
r+623=1000
r=377
377+98+g=1000
475+g=1000
g=525
verific 525+377+98=1000