Răspuns :
b+f+t=50
f=b
t=b+5
b+b+b+5=50
3b=50-5=45
b=45:3
b=15 mingi de baschet
f=15 mingi de fotbal
t=15+5=20 mingi de tenis
v: 15+15+20=50
f=b
t=b+5
b+b+b+5=50
3b=50-5=45
b=45:3
b=15 mingi de baschet
f=15 mingi de fotbal
t=15+5=20 mingi de tenis
v: 15+15+20=50
f /_______/
b /_______/ } 50m
t /_______ +5/
50-5=45m---daca ar fi egale
45:3=15m--mingi de fotb si de baschet
15+5=20mingi de tenis
verif:15+15+20=50m
b /_______/ } 50m
t /_______ +5/
50-5=45m---daca ar fi egale
45:3=15m--mingi de fotb si de baschet
15+5=20mingi de tenis
verif:15+15+20=50m