Răspunsuri

2014-04-25T17:40:34+03:00
X=nr fete
26-x=nr baieti 
x-2=2(23-x)
x-2=46-2x
x+2x=46+2
3x=48
x= \frac{48}{3}
x=16 fete
2014-04-25T17:43:53+03:00
F+b=26
f-2=2(b+3)
f=26-b
26-b-2=2b+6
24-b=2b+6
24-6=2b+b
18=3b
b=6 
f=26-6
f=20