Răspuns :
[tex] \frac{125}{100} x baieti= fete[/tex]
[tex] \frac{125}{100} x baieti+baieti =36[/tex]
[tex] \frac{5b}{4} + b=36[/tex]
amplificam cu 4
[tex] 5b+4b=144[/tex]
[tex]9b=144[/tex]
[tex]b=144:9[/tex]
baeti=16
[tex]36-16=20(fete)[/tex]
[tex] \frac{125}{100} x baieti+baieti =36[/tex]
[tex] \frac{5b}{4} + b=36[/tex]
amplificam cu 4
[tex] 5b+4b=144[/tex]
[tex]9b=144[/tex]
[tex]b=144:9[/tex]
baeti=16
[tex]36-16=20(fete)[/tex]
f=125%.b
f+b=36
125/100.b+b=36
amplificam cu 100 sa aducem la acelasi numitor : 125/100.b+100b/100=3600/100
eliminam numitorul: 125b+100b=3600
225b=3600/225
b=16
f+16=36/-16 ==> f=20
f+b=36
125/100.b+b=36
amplificam cu 100 sa aducem la acelasi numitor : 125/100.b+100b/100=3600/100
eliminam numitorul: 125b+100b=3600
225b=3600/225
b=16
f+16=36/-16 ==> f=20