Răspuns :
b+f+t=50.
f=b
t=b+5
--------------
b,f,t=?
b /--/
t /--/--/ (Pe al doilea segment punem 5)
2xb=50-5
2xb=45
b=45:2
b=22.5
f=b
22.5=22.5
t=22.5+5
t=27.5
f=b
t=b+5
--------------
b,f,t=?
b /--/
t /--/--/ (Pe al doilea segment punem 5)
2xb=50-5
2xb=45
b=45:2
b=22.5
f=b
22.5=22.5
t=22.5+5
t=27.5