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bunicul are in doua butoaie 225 lde vin.Ce cantitate are fiecare butoi,daca unul are cu 25 l de vin mai mult?

Răspuns :

1 /---/
}225
2 /---/+25

225-25=200 un segment egal
200:2=100

1 butoi=100 litri
2 butoi=100+25=125 litri

a+b=225
a=b+25

b+b+25=225
2b=200
b=100 litri
a=125 litri