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Intrun parc cresc de doua ori mai putin castani decit salcii.Cti pomi de fiecare fel cresc in parc daca in total sint 9210

Răspuns :

s= 2c
c + s = 9210
c + 2c = 9210
3c = 9210
c = 9210 : 3
c = 3070 castani
cati salcami sunt?
3070 x 2 = 6140 salcami