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La o ghereta se vindeau 427 kg de legume; rosii, castraveti si ardei. Afla ce cantitate de legume de fiecare fel era, daca rosii si castraveti erau in total 360 kg,iar ardei si castraveti -in total 175 kg.

Răspuns :

427 kg in total
rosii.......................
castraveti.............    360 kg

ardei.....................
castraveti.............  175 kg
427kg-360kg=67 kg ardei
175kg-67kg=108 kg castraveti
360kg-108kg=252kg rosii
r=rosii
c=castraveti
a=ardei
r+c+a=427
r+c=360   >>> r=360-c
a+c=175 >>> a=175-c
360-c+c+175-c=472
-c=-63
c=63 >> r=297
         >> a=112