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Ajutatima varog !
Sandu si Cristi au inpreuna 1284 timbre. Cite timbre are fiecare baiat stiind ca cristi are 126 timbre mai mult?


Răspuns :

s+c=1284
c=126+s
s+126+s=1284
2s+126=1284
2s=1158
s=579
c=126+579
c=705
pai 1284:2=642

642minus 126=516(sandu)
642+126=768