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Afla valoarea lui a,b,c daca....
a+b+c=90
a+b=40
b+c=80


Răspuns :

daca a+b=40
atunci c=90-40=50
b+c=80
a=90-80=10
a+c=50+10=60
b=90-60=30

c=50
b=30
a=10

80+a=90;;:a=90-80=10:a=10
b+40=90:b=90-40=50:b=50;c+50=80;c=80-50=30 c=30