Răspunsuri

2014-04-16T14:40:04+03:00
F+b=36
f=125/100*b
f=5/4 *b
f=5b/4
5b/4+b=36  aducem la acelasi numitor
5b+4b=144
9b=144
b=16   f=5*16/4  =5*4=20
3 2 3
2014-04-16T14:41:55+03:00
B=nr baietilor
f=nr fetelor
b+f=36
f=125:100 x b
f=5b : 4 =>
Inlocuim numarul fetelor in ecuatie
b + 5b:4 =36
Aducem la acelasi numitor:
(4b + 5b):4=36
Inmultim totul cu 4 si rezulta
9b=144
b=144:9
b=16
f+16=36
=> f=20