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o ciocolata cantareste cat 3 bomboene;impreuna cantaresc 120 grame
cat cantareste fiecare?


Răspuns :

c=3b
c+b=120
3b+b=120
4b=120
b=120:4
b=30 grame bomboana

c=30*3
c=90 grame ciocolata
a+b=120
a=3b
3b+b=120
4b=120
b=120:4
b=30 grame cantareste o bomboana
a=3x30= 90 grame cantareste o ciocolata