a+b+c+d=986
a+b+c=715
b+c=498
c+d=525
d=986-715
d=271
c=525-271
c=254
a=715-498
a=217
217+254=471
b=715-417
b=244
Raspuns: cls. 1=217
cls.2=244
cls.3=254
cls.4=271
alt mod de rezolvare (pe care ti l-as recomanda sa-l scrii↓↓↓↓↓)
Cati elevi sunt in cls. a4-a?
986-715=271
Cati elevi sunt in cls a3-a?
525-217=254
Cati elevi sunt in cls 1?
715-498=217
Cati elevi sunt in cls a2-a?
715-217-254=715-471
=244
Raspuns: cls. 1=217
cls.2=244
cls.3=254
cls.4=271√√√√
Coroana??