Răspuns :
a+b =60 a =60-b
a+30/b+36 =3/4
60-b+30 /b+36 =3/4
4(60-b+30)=3(b+36
4(90-b)=3b+108
360 -4b =3b+108
3b+4b=360-108
7b =252
b =36
a =60-b =60-36 =24
v ; 24+30/36+36 =54/72 =3/4
a+30/b+36 =3/4
60-b+30 /b+36 =3/4
4(60-b+30)=3(b+36
4(90-b)=3b+108
360 -4b =3b+108
3b+4b=360-108
7b =252
b =36
a =60-b =60-36 =24
v ; 24+30/36+36 =54/72 =3/4