Răspuns :
f+b+a=54
b=2f
f-6=a
2f+f+f-6=54
4f-6=54
4f=54+6
4f=60
f=15
b=2*15=30
a=15-6=9
b=2f
f-6=a
2f+f+f-6=54
4f-6=54
4f=54+6
4f=60
f=15
b=2*15=30
a=15-6=9
notam nr baietilor cu 2x
notam numarul fetelor cu x
adulti= x-6
2x+x+x-6=54
4x-6=54
4x=54+6
4x=60
x=60:4
x=15(fete)
15x2=30(baieti)
notam numarul fetelor cu x
adulti= x-6
2x+x+x-6=54
4x-6=54
4x=54+6
4x=60
x=60:4
x=15(fete)
15x2=30(baieti)